Title of Invention	"PHARMACEUTICAL COMPOSITIONS COMPRISING LEVETIRACETAM AND PROCESS FOR THEIR PREPARATION"
Abstract	The pharmaceutical composition of the present invention comprises a carbostyril derivative which is a dopamine-sero-tonin system stabilizer and a mood stabilizer in a pharmaceutical ly acceptable carrier. The carbostyril derivative may be aripiprazole or a metabolite thereof. The mood stabilizer may include but is not limited to lithium, valproic acid, divalproex sodium, carbamaza-pine, oxcarbamazapine, zonisamide, lamotragine, topiramate, gabapentin, levetiracetam or clonazepam. These compositions are used to treat patients with mood disorders, particularly bipolar disorder with or without psychotic features, mania or mixed episodes. Methods are provided for separate administration of a carbostyril derivative and a mood stabilizer to a patient with a mood disorder.

Title of Invention

"PHARMACEUTICAL COMPOSITIONS COMPRISING LEVETIRACETAM AND PROCESS FOR THEIR PREPARATION"

Abstract

The pharmaceutical composition of the present invention comprises a carbostyril derivative which is a dopamine-sero-tonin system stabilizer and a mood stabilizer in a pharmaceutical ly acceptable carrier. The carbostyril derivative may be aripiprazole or a metabolite thereof. The mood stabilizer may include but is not limited to lithium, valproic acid, divalproex sodium, carbamaza-pine, oxcarbamazapine, zonisamide, lamotragine, topiramate, gabapentin, levetiracetam or clonazepam. These compositions are used to treat patients with mood disorders, particularly bipolar disorder with or without psychotic features, mania or mixed episodes. Methods are provided for separate administration of a carbostyril derivative and a mood stabilizer to a patient with a mood disorder.

Full Text	PHARMACEUTICAL COMPOSITIONS COMPRISING LEVETIRACETAM AND PROCESS FOR THEIR PREPARATION The present invention relates to a novel pharmaceutical composition comprising levetiracetam and to a process for its preparation. Levetiracetam or (S)-(-)-a-ethyl-2-oxo-l-pyrrolidine acetamide, a laevorotatory compound, is disclosed as a protective agent for the treatment and the prevention of hypoxic and ischemic type aggressions of the central nervous system in the European patent No. EP 0 162 036 B and has the following formula. (Figure Removed) This compound is also effective in the treatment of epilepsy, a therapeutic indication for which it has been demonstrated that its dextrorotatory enantiomer (R)-(-)- a-ethyl-2-oxo- 1-pyrrolidine acetamide completely lacks activity (A.J. Gower et al., Eur. J. Phannacol., 222, 1992,193-203). A film-coated tablet containing 250 mg, 500 mg or 1000 mg levetiracetam is described in Rote Liste Service Gmbh "Rote Liste 2003, 2002, ECV - Editio Cantor, Aulendorf, Germany. The ingredients are maize starch, povidone K30, talc, colloidal anhydrous silica, magnesium stearate, and in the coating hypromellose, macrogol 4000, titanium dioxide. Pharmaceutical compositions comprising levetiracetam may present modified kinetics of release of the active substance as times goes along. This may lead to a slower release in time of the active ingredient and thus to reduced stability of the pharmaceutical composition. One of the consequences of this reduced stability may be an ealier expiry date of the pharmaceutical composition. According to one aspect, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0% per weight of disintegrant, 0.0 to 3.0% per weight of gliding agent, 0.5 to 6.0% per weight of binder, and 0.0 to 1.0% per weight of lubricant, with respect to the total weight of the pharmaceutical composition. The term "active ingredient" as used herein is defined as a substance which has a therapeutic effect. The amount of the active ingredient present in the pharmaceutical composition of the invention may vary depending on the mammal to which the compositions are administered and the disease to be treated. The term "disintegrant" as used herein is defined as an accelerating agent of the desintegration of the tablet and the dispersion of the active ingredient in water or gastrointestinal fluids. The disintegrant may be present in the pharmaceutical composition in the form of a single compound or in the form of a mixture of compounds. Examples of disintegrant are starches, sodium croscarmellose, also referred to as cross-linked sodium carboxymethylcellulose, and polyvinylpolypyrrolidone. Preferred disintegrants according to the present invention are polyvinylpolypyrrolidone, sodium starch glycolate and sodium croscarmellose. More preferred disintegrant according to the present invention is sodium croscarmellose. Preferably, the pharmaceutical composition according to the present invention comprises 3.0 to 7.0 % per weight of disintegrant, more preferably 3.0 to 5.0 % per weight of disintegrant, most preferably 3.9 % per weight of disintegrant with respect to the total weight of the pharmaceutical composition. The term "gliding agent" as used herein is defined as an agent improving the fluidity of the powder and thus the filling of the compression chamber of the tablet press. The gliding agent may be present in the pharmaceutical composition in the form of a single compound or in the form of a mixture of compounds. Examples of gliding agents are talc, starches, stearic acid and anhydrous colloidal silica. Preferred gliding agent according to the present invention is anhydrous colloidal silica. Preferably, the pharmaceutical composition according to the present invention comprises 0.5 to 2.5 % per weight of gliding agent, more preferably 1.0 to 2.0 % per weight of gliding agent, most preferably 1.9 % per weight of gliding agent with respect to the total weight of the pharmaceutical composition. The term "binder" as used herein is defined as an agent able to bind particles which cannot be bound only by a compression force. The binder may be present in the form of a single compound or in the form of a mixture of compounds. Examples of binders are macrogols, microcrystalline cellulose, saccharose, mannitol or sorbitol. Preferred binders according to the present invention are macrogols. Most preferred binder according to the present invention is polyethylene glycol 6000, also referred to as macrogol 6000. As will be understood by the person skilled in the art, the number "6000" after polyethylene glycol refers to the average molecular weight of the polyethylene glycol. Usually, the pharmaceutical composition according to the present invention comprises 0.5 to 4.0% per weight of binder with respect to the total weight of the pharmaceutical composition. Particularly, the pharmaceutical composition according to the present invention comprises 0.5% to 2.5% per weight of binder with respect to the total weight of the pharmaceutical composition. Preferably, the pharmaceutical composition according to the present invention comprises 0.7 to 1.8 % per weight of binder, more preferably 0.8 to 1.6 % per weight of binder, most preferably 0.9% of binder with respect to the total weight of the pharamaceutical composition. The term "lubricant" as used herein is defined as an agent able to decrease adhesion of a powder to punches and friction between particles. The lubricant may be present in the pharmaceutical composition in the form of a single compound or in the form of a mixture of compounds. Examples of lubricants are talc, magnesium stearate or calcium stearate. Preferred lubricant according to the present invention is magnesium stearate. Usually, the pharmaceutical composition according to the present invention comprises 0.0 to 0.75% per weight of lubricant with respect to the total weight of the pharmaceutical composition. Particularly, the pharmaceutical composition according to the present invention comprises 0.0 to 0.50% per weight of lubricant with respect to the total weight of the pharmaceutical composition. The pharmaceutical composition according to the present invention comprises preferably 0.05 to 0.25 % per weight of lubricant, more preferably 0.08 to 0.15 % per weight of lubricant, most preferably 0.11 % per weight of lubricant with respect to the total weight of the pharmaceutical composition. The pharmaceutical composition according to the present invention presents an increased stability in time of the release of levetiracetam as active ingredient compared to known pharmaceutical compositions comprising levetiracetam. Particularly, the pharamaceutical composition according to the present invention presents an increased stability in time of the release of levetiracetam as active ingredient compared to pharmaceutical compositions comprising levetiracetam manufactured by conventional processes, for example wet granulation process. Preferably, the pharmaceutical composition according to the present invention ensures substantially stable release of the active ingredient as time goes by. In one embodiment, the pharmaceutical composition according to the present invention comprises at least 2.0 to 9.0% per weight of sodium croscarmellose with respect to total weight of the pharmaceutical composition. In another embodiment, the pharmaceutical composition according to the present invention comprises at least 0,0 to 3.0% per weight of anhydrous colloidal silica with respect to total weight of the pharmaceutical composition. In yet another embodiment, the pharmaceutical composition according to the present invention comprises 0.5 to 6.0 % per weight of polyethylene glycol 6000 with respect to total weight of the pharmaceutical composition. In a further embodiment, the pharmaceutical composition according to the present invention comprises 0.0 to 1.0 % per weight of magnesium stearate with respect to total weight of the pharmaceutical composition. Usually, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0 % per weight of disintegrant, 0.0 to 3.0 % per weight of gliding agent, 0.5 to 4.0% per weight of binder, and 0.0 to 0.75 % per weight of lubricant, with respect to the total weight of the pharmaceutical composition. Particularly, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0 % per weight of disintegrant, 0.0 to 3.0 % per weight of gliding agent, 0.5 to 2.5% per weight of binder, and 0.0 to 0.50 % per weight of lubricant, with respect to the total weight of the pharmaceutical composition. Preferably, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 3.0 to 7.0 % per weight of disintegrant, 0.5 to 2.5 % per weight of gliding agent, 0.7 to 1.8 % per weight of binder, and 0.05 to 0.25 % per weight of lubricant, with respect to the total weight of the pharmaceutical composition. More preferably, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 3.0 to 5.0 % per weight of disintegrant, 1.0 to 2.0 % per weight of gliding agent, 0.8 to 1.6 % per weight of binder, and 0.08 to 0.15 % per weight of lubricant, with respect to the total weight of the pharmaceutical composition. Usually, the pharmaceutical composition according to the present invention comprises 80 to 95 % per weight of levetiracetam. preferably 85 to 93 % per weight of levetiracetam, more preferably 90 to 92 % per weight of levetiracetam with respect to the total weight of the pharmaceutical composition. In a particular embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0 % per weight of sodium croscarmellose, 0.0 to 3.0 % per weight of anhydrous colloidal silica, 0.5 to 6.0 % per weight of polyethylene glycol 6000, and 0.0 to 1.0 % per weight of magnesium stearate, with respect to the total weight of the pharmaceutical composition. Usually, in this particular embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0 % per weight of sodium croscarmellose, 0.0 to 3.0 % per weight of anhydrous colloidal silica, 0.5 to 4.0 % per weight of polyethylene glycol 6000, and 0.0 to 0.75 % per weight of magnesium stearate, with respect to the total weight of the pharmaceutical composition. Particularly, in this particular embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0 % per weight of sodium croscarmellose, 0.0 to 3.0 % per weight of anhydrous colloidal silica, 0.5 to 2.5 % per weight of polyethylene glycol 6000, and 0.0 to 0.50 % per weight of magnesium stearate, with respect to the total weight of the pharmaceutical composition Preferably, in this particular embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 3.0 to 7.0 % per weight of sodium croscarmellose, 0.5 to 2.5 % per weight of anhydrous colloidal silica, 0.7 to 1.8 %per weight of polyethylene glycol 6000, and 0.05 to 0.25 % per weight of magnesium stearate with respect to the total weight of the pharmaceutical composition. More preferably, in this particular embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 3.0 to 5.0 % per weight of sodium croscarmellose, 1.0 to 2.0 % per weight of anhydrous colloidal silica, 0.8 to 1.6 % per weight of polyethylene glycol 6000, and 0.08 to 0.15 % per weight of magnesium stearate. In a further particular embodiment, the present invention relates to a pharmaceutical composition comprising 80 to 95% per weight of levetiracetam, 2.0 to 9.0 % per weight of sodium croscarmellose, 0.0 to 3.0 % per weight of anhydrous colloidal silica, 0.5 to 6.0 % per weight of polyethylene glycol 6000, and 0.0 to 1.0 % per weight of magnesium stearate, with respect to the total weight of the pharmaceutical composition. Usually, in this further particular embodiment, the present invention relates to a pharmaceutical composition comprising 80 to 95% per weight of levetiracetam 2.0 to 9.0 % per weight of sodium croscarmellose, 0.0 to 3.0 % per weight of anhydrous colloidal silica, 0.5 to 4.0 %per weight of polyethylene glycol 6000, and 0.0 to 0.75 % per weight of magnesium stearate with respect to the total weight of the pharmaceutical composition. Particularly, in this further particular embodiment, the present invention relates to a pharmaceutical composition comprising 80 to 95% per weight of levetiracetam 2.0 to 9.0 % per weight of sodium croscarmellose, 0.0 to 3.0 % per weight of anhydrous colloidal silica, 0.5 to 2.5 % per weight of polyethylene glycol 6000, and 0.0 to 0.50 % per weight of magnesium stearate with respect to the total weight of the pharmaceutical composition. Preferably, in this further particular embodiment, the present invention relates to a pharmaceutical composition comprising 85 to 93% per weight of levetiracetam 3.0 to 7.0 % per weight of sodium croscarmellose, 0.5 to 2.5 % per weight of anhydrous colloidal silica, 0.7 to 1.8 %per weight of polyethylene glycol 6000, and 0.05 to 0.25 % per weight of magnesium stearate with respect to the total weight of the pharmaceutical composition. More preferably, in this further particular embodiment, the present invention relates to a pharmaceutical composition comprising 90 to 92 % per weight of levetiracetam, 3.0 to 5.0 % per weight of sodium croscarmellose, 1.0 to 2.0 % per weight of anhydrous colloidal silica, 0.8 to 1.6 % per weight of polyethylene glycol 6000, and 0.08 to 0.15 % per weight of magnesium stearate. In one embodiment of the present invention, the sum of disintegrant, gliding agent, binder and lubricant present in the pharmaceutical composition comprising levetiracetam as active ingredient is less than or equal to 20 % per weight, preferably less than or equal to 15 % per weight, more preferably less than or equal to 10 % per weight with respect to the total weight of the pharmaceutical composition. Said values for the sum of disintegrant, gliding agent, binder and lubricant present the further advantage of reducing the size and weight of the pharmaceutical composition for a given quantity of active ingredient thereby increasing the ease of administration to a patient. Most preferably, the sum of sodium croscarmellose, anhydrous colloidal silica, polyethylene glycol 6000, and magnesium stearate present in the pharmaceutical composition comprising levetiracetam according to the present invention is less than 10 % per weight with respect to the total weight of the pharmaceutical composition. The pharmaceutical composition according to the present invention is preferably administered orally. The pharmaceutical composition according to the present invention is preferably in the form of a solid, more preferably in the form of a tablet. The tablet may be uncoated or coated with a coating agent. In one embodiment, the pharmaceutical composition according to the present invention comprises 1.0 to 6.0% per weight of coating agent, preferably 2.0 to 5.0% per weight of coating agent, more preferably 2.5 to 4.5 % per weight of coating agent, most preferably 2.9% per weight of coating agent with respect to the total weight of the pharmaceutical composition. In a preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9,0% per weight of disintegrant, 0 to 3.0% per weight of gliding agent, 0.5 to 6.0% per weight of binder, 0.0 to 1.0% per weight of lubricant, and 1.0 to 6.0 % per weight of a coating agent, with respect to the total weight of the pharmaceutical composition. Usually, in this preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0% per weight of disintegrant, 0 to 3.0% per weight of gliding agent, 0.5 to 4.0% per weight of binder, 0.0 to 0.75% per weight of lubricant, and 1.0 to 6.0 % per weight of a coating agent, with respect to the total weight of the pharmaceutical composition. Particularly, in this preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0% per weight of disintegrant, 0 to 3.0% per weight of gliding agent, 0.5 to 2.5% per weight of binder, 0.0 to 0.50% per weight of lubricant, and 1.0 to 6.0 % per weight of a coating agent, with respect to the total weight of the pharmaceutical composition. Preferably, in this preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 3.0 to 7.0 % per weight of disintegrant, 0.5 to 2.5 % per weight of gliding agent, 0.7 to 1.8 % per weight of binder, 0.05 to 0.25 % per weight of lubricant, and 2.0 to to 5.0% per weight of coating agent with respect to the total weight of the pharmaceutical composition. More preferably, in this preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 3.0 to 5.0 % per weight of disintegrant, 1.0 to 2.0 % per weight of gliding agent, 0.8 to 1.6 % per weight of binder, 0.08 to 0.15 % per weight of lubricant, and 2.5 to 4.5 % of coating agent, with respect to the total weight of the pharmaceutical composition. Examples of coating agents are ethylcellulose, hydroxypropylmethylcellulose and methacrylic acid-alkyl acrylate copolymers. Preferred coating agents are hydroxypropylmethylcellulose aqueous dispersions. More preferred coating agent according to the present invention is Opadry®. Opadry® is a hydroxypropylmethylcellulose aqueous dispersion. Examples of Opadry® are Opadry® 85F20694, Opadry® 85F32004, Opadry® 85F23452 and Opadry® 85F18422. The coating agent preferably comprises polyvinyl alcohol (PVA) which coating agent ensures a better gliding of the tablets upon packaging. More preferably, the coating agent comprises partially hydrolyzed polyvinyl alcohol. The presence of polyvinyl alcohol in the coating agent may also ensure a better adhesion of the coating to the tablet. Moreover, higher concentrations of coating agents may be used. In another embodiment, the pharmaceutical composition according to the present invention comprises 1.0 to 6.0% per weight of coating agent comprising polyvinyl alcohol, preferably 2.0 to 5.0% per weight of coating agent comprising polyvinyl alcohol, more preferably 2.5 to 4.5 % per weight of coating agent comprising polyvinyl alcohol, most preferably 2.9% per weight of coating agent comprising polyvinyl alcohol with respect to the total weight of the pharmaceutical composition. In this embodiment, the polyvinyl alcohol is preferably partially hydrolyzed. In a particular embodiment according to the present invention, the sum of disintegrant, gliding agent, binder, lubricant and coating agent present in the pharamaceutical composition comrprising levetiracetam as active ingredient is less than or equal to 20 % per weight, preferably less than or equal to 15 % per weight, more preferably less than or equal to 10 % per weight with respect to the total weight of the pharmaceutical composition. In a more preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0 % per weight of sodium croscarmellose, 0.0 to 3.0 % per weight of anhydrous colloidal silica, 0.5 to 6.0 % per weight of polyethylene glycol 6000, and 0.0 to 1.0 % per weight of magnesium stearate, 1.0 to 6.0% per weight of Opadry®, with respect to the total weight of the pharmaceutical composition. Usually, in this more preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0 % per weight of sodium croscarmellose, 0.0 to 3.0 % per weight of anhydrous colloidal silica, 0.5 to 4.0 % per weight of polyethylene glycol 6000, and 0.0 to 0.75 % per weight of magnesium stearate, 1.0 to 6.0% per weight of Opadry®, with respect to the total weight of the pharmaceutical composition. Particularly, in this more preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0 % per weight of sodium croscarmellose, 0.0 to 3.0 % per weight of anhydrous colloidal silica, 0.5 to 2.5 % per weight of polyethylene glycol 6000, and 0.0 to 0.50 % per weight of magnesium stearate, 1.0% to 6.0% per weight of Opadry®, with respect to the total weight of the pharmaceutical composition. Preferably, in this more preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 3.0 to 7.0 % per weight of sodium croscarmellose, 0.5 to 2.5 % per weight of anhydrous colloidal silica, 0.7 to 1.8 %per weight of polyethylene glycol 6000, 0.05 to 0.25 % per weight of magnesium stearate, and 2.0 to 5.0% per weight of Opadry®, with respect to the total weight of the pharmaceutical composition. More preferably, in this more preferred embodiment, the present invention relates to a pharmaceutical composition comprising levetiracetam as active ingredient and 3.0 to 5.0 % per weight of sodium croscarmellose, 1.0 to 2.0 % per weight of anhydrous colloidal silica, 0.8 to 1.6 % per weight of polyethylene glycol 6000, 0.08 to 0.15 % per weight of magnesium stearate, and 2.5 to 4.5% per weight of Opadry®, with respect to the total weight of the pharmaceutical composition. In the above mentioned pharmaceutical compositions, Opadry® preferably comprises polyvinyl alcohol. More preferably, Opadry® comprises partially hydrolyzed polyvinyl alcohol. In another particular embodiment, the sum of sodium croscarmellose, anhydrous colloidal silica, polyethylene glycol 6000, magnesium stearate and Opadry® in the pharmaceutical composition comprising levetiracetam is less than 10% per weight with respect to the total weight of the pharmaceutical composition. Optionally, the pharmaceutical composition according to the present invention may contain a diluent or filler. The term "diluent" or "filler" as used herein is defined as an inert agent designed to increase the weight and/or the size of the pharmaceutical composition, for example in the case of a tablet. The diluent or the filler may be present in the pharmaceutical composition hi the form of a single compound or in the form of a mixture of compounds. Preferably the diluent of the filler is added when the amount of the active ingredient and the other excipients is too small to obtain a tablet of suitable size. Examples of diluents or fillers according to the present invention are starches, lactose, mannitol, sugars or mineral salts. Percentages per weight of diluent or filler necessary to obtain a pharmaceutical composition according to the present invention will be determined according to conventional methods known to the person skilled in the art. Optionally, the pharmaceutical composition according to the present invention may contain a sweetening agent such as sucrose or saccharine, a coloring agent or a flavoring agent. Optionally, the pharmaceutical composition according to the present invention may comprise a taste-masking agent. Preferably, the pharmaceutical composition according to the present invention comprises a coating agent which has taste-masking properties. Generally, existing pharmaceutical composition comprising levetiracetam are manufactured by a wet granulation process according to conventional methods known to the man skilled in the art. Such a wet granulation process may cause degradation of the active ingredient upon contact with the liquid phase. Furthermore, such a process requires a drying step which is time consuming and, due to the presence of a heat source, increases costs of production. Therefore, in another aspect, the present invention relates to a process of manufacturing a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0% per weight of disintegrant, 0 to 3.0% per weight of gliding agent, 0.5 to 6.0% per weight of binder, and 0.0 to 1.0% per weight of lubricant, with respect to the total weight of the pharmaceutical composition, which process comprises the steps of: i) mixing levetiracetam, the gliding agent, the disintegrant and the binder, ii) adding the lubricant, iii) mixing levetiracetam, the gliding agent, the disintegrant, the binder and the lubricant; iv) compacting the mixture obtained in step iii), v) grinding the mixture obtained in step iv), and vi) compressing the mixture obtained hi step v). The term "compacting" as used herein is defined as the transformation of a powder into a coherent specimen of a defined shape by compression (eg by a roller compacter). The term "grinding" as used herein is defined as the reduction of the particle size by sieving. The term "compressing" as used herein is defined as the application of a sufficient force by the punches of a tablet press on a powder to compact it into a tablet. Preferably, at least one of levetiracetam, disintegrant, gliding agent or binder undergoes desagglomeration prior to mixing. The term "desagglomeration" as used herein is defined as the disruption of agglomerates in the powder. Preferably, the grinding step is achieved on a sieve of less than 5 mm, more preferably less than 3 mm, most preferably on a sieve of 1.5 mm. The process according to the present invention comprises fewer steps than the wet granulation process thus ensuring lower costs of production. Furthermore, said process avoids degradation of the active ingredient upon contact with a liquid phase. Preferably, the process comprises a further coating step in which water, preferably purified water, is added to the coating agent and resulting suspension is sprayed on the mixture resulting from step vi). Preferred coating agent is Opadry®. More preferred coating agent is selected from Opadry® 85F20694, Opadry® 85F32004, Opadry® 85F23452 and Opadry® 85F18422. Most preferred coating agent comprises polyvinyl alcohol. The present invention further relates to a process of manufacturing pharmaceutical compositions comprising preferred, more preferred and most preferred percentages per weight of levetiracetam, disintegrant, gliding agent, binder, lubricant and coating agent as defined above for these pharmaceutical compositions, which process comprises steps i) to vi) as defined here above. In a preferred embodiment, the present invention relates to a process of manufacturing a pharmaceutical composition comprising levetiracteam as active ingredient and 2.0 to 9.0% per weight of sodium croscarmellose, 0.0 to 3.0% per weight of anhydrous colloidal silica, 0.5 to 6.0% per weight of polyethylene glycol 6000, and 0.0 to 1.0% per weight of magnesium stearate, with respect to the total weight of the pharmaceutical composition, which process comprises the steps of: i) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose, polyethylene glycol 6000, ii) adding magnesium stearate, iii) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose, polyethylene glycol 6000 and magnesium stearate; iv) compacting mixture obtained in step iii), v) grinding mixture obtained in step iv), and vi) compressing mixture obtained in step v). In a more preferred embodiment, the present invention relates to a process of manufacturing a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0% per weight of sodium croscarmellose, 0.0 to 3.0% per weight of anhydrous colloidal silica, 0.5 to 6.0% per weight of polyethylene glycol 6000, 0.0 to 1.0% per weight of magnesium stearate, 1.0 to 6.0 % per weight of Opadry® with respect to the total weight of the pharmaceutical composition, which process comprises the steps of: i) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose, polyethylene glycol 6000, ii) adding magnesium stearate, iii) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose, polyethylene glycol 6000 and magnesium stearate; iv) compacting mixture obtained in step iii), v) grinding mixture obtained in step iv), vi) compressing mixture obtained in step v), and vii) spraying onto the mixture obtained in step vi) a suspension of hydroxypropylmethylcellulose comprising Opadry®. In this more preferred embodiment, Opadry® preferably comprises polyvinyl alcohol. The present invention further relates to a process of manufacturing pharmaceutical compositions comprising usual, particular, preferred, more preferred and most preferred percentages per weight of levetiracetam, sodium croscarmellose, anhydrous colloidal silica, polyethylene glycol 6000, magnesium stearate and Opadry® as defined above for these pharmaceutical compositions, which process comprises steps i) to vii) as defined here above. In another aspect the present invention relates to a pharmaceutical composition comprising levetiracetam and 2.0 to 9.0% per weight of disintegrant, 0 to 3.0% per weight of gliding agent, 0.5 to 6.0% per weight of binder, and 0.0 to 1.0% per weight of lubricant, with respect to the total weight of the pharmaceutical composition, useful for the treatment or prevention of a disease. By the term "disease", we understand a disease selected from the group consisiting of epileptogenesis, seizure disorders, convulsions, Parkinson's disease, dyskinesia induced by dopamine replacement therapy, tardive dyskinesia induced by administration of neuroleptic drugs, Huntington Chorea, and other neurological disorders including bipolar disorders, mania, depression, anxiety, attention deficit hyperactivity disorder (ADHD), migraine, trigeminal and other neuralgia, chronic pain, neuropathic pain, cerebral ischemia, cardiac arrhythmia, myotonia, cocaine abuse, stroke, myoclonus, tremor, essential tremor, simple or complex tics, Tourette syndrome, restless leg syndrome and other movement disorders, neonatal cerebral haemorrhage, amyotrophic lateral sclerosis, spasticity and degenerative diseases, bronchial asthma, asthmatic status and allergic bronchitis, asthmatic syndrome, bronchial hyperreactivity and bronchospastic syndromes as well as allergic and vasomotor rhinitis and rhinoconjunctivitis. The term "treatment" as used herein, includes curative treatment and prophylactic treatment. By "curative" is meant efficacy in treating a current symptomatic episode of a disorder or condition. By "prophylactic" is meant prevention of the occurrence or recurrence of a disorder or condition. The present invention concerns also a method for treatment of a human patient by using the pharmaceutical composition. The present invention concerns also the pharmaceutical composition for use as a medicament for curing the said disease. The present invention concerns also the use of the pharmaceutical composition for the manufacture of a medicament for a therapeutic application in the said disease. Preferably said disease is selected from the group consisting essentially of epilepsy, Parkinson's disease, dyskinesia, migraine, tremor, essential tremor, bipolar disorders, chronic pain, neuropathic pain, or bronchial, asthmatic or allergic conditions. More preferably said disease is epilepsy. The present invention concerns also a method for manufacturing a medicament intended for therapeutic application in the said disease, characterized in that the pharmaceutical composition according to the present invention is used. The present invention is also directed to methods of treating humans to alleviate disease by the administration of the pharmaceutical composition. Figure 1 shows a flow chart of the process according to the present invention. Figure 2 shows a flow chart of the wet granulation process. Figure 3 shows comparative dissolution kinetics for pharmaceutical composition A of example 1 according to our invention and known pharmaceutical composition E of example 2 immediately after manufacturing. Figure 4 shows comparative dissolution kinetics for pharmaceutical composition A of example 1 according to our invention and known pharmaceutical composition E of example 2 six months after manufacturing. Figure 5 shows comparative dissolution kinetics for pharmaceutical composition B of example 1 according to our invention and known pharmaceutical composition F of example 2 immediately after manufacturing. Figure 6 shows comparative dissolution kinetics for pharmaceutical composition B of example 1 according to our invention and known pharmaceutical composition F of example 2 six months after manufacturing. Figure 7 shows comparative dissolution kinetics for pharmaceutical composition C of example 1 according to our invention and known pharmaceutical composition G of example 2 immediately after manufacturing. Figure 8 shows comparative dissolution kinetics for pharmaceutical composition C of example 1 according to our invention and known pharmaceutical composition G of example 2 six months after manufacturing. Figure 9 shows comparative dissolution kinetics for pharmaceutical composition D of example 1 according to our invention and known pharmaceutical composition H of example 2 immediately after manufacturing. Figure 10 shows comparative dissolution kinetics for pharmaceutical composition D of example 1 according to our invention and known pharmaceutical composition H of example 2 six months after manufacturing. The following examples are provided for illustrative purposes only and are not intended, nor should they be construed, as limiting the invention in any manner. Those skilled in the art will appreciate that routine variations and modifications of the following examples can be made without exceeding the spirit or scope of the invention. EXAMPLES Example 1 Table I shows four pharmaceutical compositions (A, B, C and D) with different quantities of active ingredient levetiracetam which were manufactured according to the process disclosed in figure 1, referred to as dry granulation process. (Table Removed) Example 2 Table II shows four pharmaceutical compositions (E, F, G and H) with different quantities of active ingredient levetiracetam which were manufactured according to the process disclosed in figure 2, referred to as wet granulation process. These compositions are not within the scope of the present invention and have been manufactured for comparative study. (Table Removed) Example 3 Kinetics of release of active ingredient have been measured for compositions A to H. These kinetics have been measured for all compositions immediately after manufacturing and six months after manufacturing. During these six months, the pharmaceutical compositions have been kept under blister at 40°C and at a level of relative humidity of 75%. The dissolution tests are made in an USP Apparatus 2 (paddle apparatus), volume 900 mL, speed 50 rpm, and temperature 37°C. Figures 3 to 10 show that for pharmaceutical compositions manufactured according to the dry granulation process, pourcentages of dissolution are more stable than for compositions manufactured according to the wet granulation process. This suggests that pharmaceutical compositions A to D are more stable in time than pharmaceutical compositions E to H. Example 4 The six following pharmaceutical compositions were manufactured according to the process disclosed in figure 1, referred to as dry granulation process. Composition I comprises 1000 mg of levetiracetam, 40 mg of polyvinylpolypyrrolidone, 60 mg of sorbitol and 5 mg of magnesium stearate. Composition J comprises 1000 mg of levetiracetam, 30 mg of sodium carboxymethylcellulose, 30 mg of starch, 30 mg of macrogol and 1 mg of magnesium stearate. Composition K comprises 1000 mg of levetiracetam, 40 mg of sodium croscarmellose, 60 mg of microcrystalline cellulose, 5 mg of colloidal silica and 5 mg of calcium stearate. Composition L comprises 1000 mg of levetiracetam, 40 mg of polyvinylpolypyrrolidone, 10 mg of colloidal silica, 15 mg of talc and 20 mg of macrogol. Composition M comprises 1000 mg of levetiracetam, 37.5 mg of sodium starch glycolate, 10 mg of colloidal silica, 20 mg of macrogol and 1.25 mg of magnesium stearate. Composition N comprises 1000 mg of levetiracetam, 30 mg of polyvinylpolypyrrolidone, 20 mg of colloidal silica, 60 mg of mannitol and 5 mg of magnesium stearate. These compositions were coated with hydroxypropylmethylcellulose aqueous dispersions or polyvinyl alcohol aqueous dispersions. These 6 compositions are stable. CLAIMS 1. A pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0% per weight of disintegrant, 0.0 to 3.0% per weight of gliding agent, 0.5 to 6.0% per weight of binder, and 0.0 to 1.0% per weight of lubricant, with respect to the total weight of the pharmaceutical composition. 2. The pharmaceutical composition according to claim 1 comprising 3.0 to 7.0% per weight of disintegrant with respect to the total weight of the pharmaceutical composition. 3. The pharmaceutical composition according to any preceding claim comprising 3.0 to 5.0% per weight of disintegrant with respect to the total weight of the pharmaceutical composition. 4. The pharmaceutical composition according to any preceding claim comprising 0.5 to 2.5% per weight of gliding agent with respect to the total weight of the pharmaceutical composition. 5. The pharmaceutical composition according to any preceding claim comprising 1.0 to 2.0% per weight of gliding agent with respect to the total weight of the pharmaceutical composition. 6. The pharmaceutical composition according to any preceding claim comprising 0.5 to 4.0 % per weight of binder with respect to the toatl weight of the pharmaceutical composition. 7. The pharmaceutical composition according to any preceding claim comprising 0.5 to 2.5% per weight of binder with respect to the total weight of the pharmaceutical composition. 8. The pharmaceutical composition according to any preceding claim comprising 0.7 to 1.8% per weight of binder with respect to the total weight of the pharmaceutical composition. 9. The pharmaceutical composition according to any preceding claim comprising 0.8 to 1.6% per weight of binder with respect to the total weight of the pharmaceutical composition. 10. The pharmaceutical composition according to any preceding claim comprising 0.0 to 0.75% per weight of lubricant with respect to the total weight of the pharmaceutical composition. 11. The pharmaceutical composition according to any preceding claim comprising 0.0 to 0.50% per weight of lubricant with respect to the total weight of the pharmaceutical composition. 12. The pharmaceutical composition according to any preceding claim comprising 0.05 to 0.25% per weight of lubricant with respect to the total weight of the pharmaceutical composition. 13. The pharmaceutical composition according to any preceding claim comprising 0.08 to 0.15% per weight of lubricant with respect to the total weight of the pharmaceutical composition. 14. The pharmaceutical composition according to any preceding claim wherein the sum of disintegrant, gliding agent, binder and lubricant is less than or eqaul to 20% per weight with respect to the total weight of the pharmaceutical composition. 15. The pharmaceutical composition according to any preceding claim wherein the disintegrant is sodium croscarmellose. 16. The pharmaceutical composition according to any preceding claim wherein the gliding agent is anhydrous colloidal silica. 17. The pharmaceutical composition according to any preceding claim wherein the binder is polyethylene glycol 6000. 18. The pharmaceutical composition according to any preceding claim wherein the lubricant is magnesium stearate. 19. The pharmaceutical composition according to any preceding claim comprising 2.0 to 9.0% per weight of sodium croscarmellose with respect to total weight of the pharmaceutical composition. 20. The pharmaceutical composition according to any preceding claim comprising 0.0 to 3.0 % per weight of anhydrous colloidal silica with respect to total weight of the pharmaceutical composition. 21. The pharmaceutical composition according to any preceding claim comprising 0.5 to 6.0% per weight of polyethylene glycol 6000 with respect to total weight of the pharmaceutical composition. 22. The pharmaceutical composition according to any preceding claim comprising 0.0 to 1.0% per weight of magnesium stearate with respect to total weight of the pharmaceutical composition. 23. The pharmaceutical composition according to any preceding claim which comprises 80 % to 95% per weight of levetiracetam 24. The pharmaceutical composition according to any preceding claim which comprises a coating agent. 25. The pharmaceutical composition according to claim 24 wherein the coating agent comprises polyvinyl alcohol. 26. The pharmaceutical composition according to any one of claims 24 and 25 wherein the coating agent is hydroxypropylmethylcellulose aqueous dispersions (Opadry®). 27. The pharmaceutical composition according to any preceding claim which is a tablet. 28. A process of manufacturing a pharmaceutical composition comprising levetiracetam as active ingredient and 2.0 to 9.0% per weight of disintegrant, 0 to 3.0% per weight of gliding agent, 0.5 to 6.0% per weight of binder, and 0.0 to 1.0% per weight of lubricant, with respect to the total weight of the pharmaceutical composition, which process comprises the steps of: i) mixing levetiracetam, the gliding agent, the disintegrant and the binder, ii) adding the lubricant, iii) mixing levetiracetam, the gliding agent, the disintegrant, the binder and the lubricant; iv) compacting the mixture obtained in step iii), v) grinding the mixture obtained in step iv), and vi) compressing the mixture obtained in step v). 29. A process of manufacturing a pharmaceutical composition according to claim 28 comprising levetiracteam as active ingredient and 2.0 to 9.0% per weight of sodium croscarmellose, 0.0 to 3.0% per weight of anhydrous colloidal silica, 0.5 to 6.0% per weight of polyethylene glycol 6000, and 0.0 to 1.0% per weight of magnesium stearate, with respect to the total weight of the pharmaceutical composition, which process comprises the steps of: i) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose, polyethylene glycol 6000, ii) adding magnesium stearate, iii) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose, polyethylene glycol 6000 and magnesium stearate; iv) compacting mixture obtained hi step iii), v) grinding mixture obtained in step iv), and vi) compressing mixture obtained in step v). 30. A process according to claim 29 comprising spraying onto the mixture obtained hi step vi) a coating agent which is a suspension of hydroxypropylmethylcellulose comprising Opadry®. 31. A process according to claim 30 wherein the coating agent comprises polyvinylalcohol. 32. A pharmaceutical composition comprising levetiracetam and 2.0 to 9.0% per weight of disintegrant, 0 to 3.0% per weight of gliding agent, 0.5 to 6.0% per weight of binder, and 0.0 to 1.0% per weight of lubricant, with respect to the total weight of the pharmaceutical composition for the treatment of of epilepsy, Parkinson's disease, dyskinesia, migraine, tremor, essential tremor, bipolar disorders, chronic pain, neuropathic pain, or bronchial, asthmatic or allergic conditions 33. Use of a pharmaceutical composition according to any one of claims 1 to 27 for the manufacture of a medicament for the treatment of of epilepsy, Parkinson's disease, dyskinesia, migraine, tremor, essential tremor, bipolar disorders, chronic pain, neuropathic pain, or bronchial, asthmatic or allergic conditions.

Full Text

PHARMACEUTICAL COMPOSITIONS COMPRISING LEVETIRACETAM AND
PROCESS FOR THEIR PREPARATION
The present invention relates to a novel pharmaceutical composition comprising
levetiracetam and to a process for its preparation.
Levetiracetam or (S)-(-)-a-ethyl-2-oxo-l-pyrrolidine acetamide, a laevorotatory
compound, is disclosed as a protective agent for the treatment and the prevention of
hypoxic and ischemic type aggressions of the central nervous system in the European
patent No. EP 0 162 036 B and has the following formula.
(Figure Removed)
This compound is also effective in the treatment of epilepsy, a therapeutic
indication for which it has been demonstrated that its dextrorotatory enantiomer (R)-(-)-
a-ethyl-2-oxo- 1-pyrrolidine acetamide completely lacks activity (A.J. Gower et al., Eur.
J. Phannacol., 222, 1992,193-203).
A film-coated tablet containing 250 mg, 500 mg or 1000 mg levetiracetam is
described in Rote Liste Service Gmbh "Rote Liste 2003, 2002, ECV - Editio Cantor,
Aulendorf, Germany. The ingredients are maize starch, povidone K30, talc, colloidal
anhydrous silica, magnesium stearate, and in the coating hypromellose, macrogol 4000,
titanium dioxide.
Pharmaceutical compositions comprising levetiracetam may present modified
kinetics of release of the active substance as times goes along. This may lead to a slower
release in time of the active ingredient and thus to reduced stability of the
pharmaceutical composition. One of the consequences of this reduced stability may be
an ealier expiry date of the pharmaceutical composition.
According to one aspect, the present invention relates to a pharmaceutical
composition comprising levetiracetam as active ingredient and
2.0 to 9.0% per weight of disintegrant,
0.0 to 3.0% per weight of gliding agent,
0.5 to 6.0% per weight of binder, and
0.0 to 1.0% per weight of lubricant,
with respect to the total weight of the pharmaceutical composition.
The term "active ingredient" as used herein is defined as a substance which has a
therapeutic effect.
The amount of the active ingredient present in the pharmaceutical composition
of the invention may vary depending on the mammal to which the compositions are
administered and the disease to be treated.
The term "disintegrant" as used herein is defined as an accelerating agent of the
desintegration of the tablet and the dispersion of the active ingredient in water or
gastrointestinal fluids. The disintegrant may be present in the pharmaceutical
composition in the form of a single compound or in the form of a mixture of
compounds.
Examples of disintegrant are starches, sodium croscarmellose, also referred to as
cross-linked sodium carboxymethylcellulose, and polyvinylpolypyrrolidone. Preferred
disintegrants according to the present invention are polyvinylpolypyrrolidone, sodium
starch glycolate and sodium croscarmellose. More preferred disintegrant according to
the present invention is sodium croscarmellose.
Preferably, the pharmaceutical composition according to the present invention
comprises 3.0 to 7.0 % per weight of disintegrant, more preferably 3.0 to 5.0 % per
weight of disintegrant, most preferably 3.9 % per weight of disintegrant with respect to
the total weight of the pharmaceutical composition.
The term "gliding agent" as used herein is defined as an agent improving the
fluidity of the powder and thus the filling of the compression chamber of the tablet
press. The gliding agent may be present in the pharmaceutical composition in the form
of a single compound or in the form of a mixture of compounds.
Examples of gliding agents are talc, starches, stearic acid and anhydrous
colloidal silica. Preferred gliding agent according to the present invention is anhydrous
colloidal silica.
Preferably, the pharmaceutical composition according to the present invention
comprises 0.5 to 2.5 % per weight of gliding agent, more preferably 1.0 to 2.0 % per
weight of gliding agent, most preferably 1.9 % per weight of gliding agent with respect
to the total weight of the pharmaceutical composition.
The term "binder" as used herein is defined as an agent able to bind particles
which cannot be bound only by a compression force. The binder may be present in the
form of a single compound or in the form of a mixture of compounds.
Examples of binders are macrogols, microcrystalline cellulose, saccharose,
mannitol or sorbitol. Preferred binders according to the present invention are macrogols.
Most preferred binder according to the present invention is polyethylene glycol 6000,
also referred to as macrogol 6000.
As will be understood by the person skilled in the art, the number "6000" after
polyethylene glycol refers to the average molecular weight of the polyethylene glycol.
Usually, the pharmaceutical composition according to the present invention
comprises 0.5 to 4.0% per weight of binder with respect to the total weight of the
pharmaceutical composition.
Particularly, the pharmaceutical composition according to the present invention
comprises 0.5% to 2.5% per weight of binder with respect to the total weight of the
pharmaceutical composition.
Preferably, the pharmaceutical composition according to the present invention
comprises 0.7 to 1.8 % per weight of binder, more preferably 0.8 to 1.6 % per weight of
binder, most preferably 0.9% of binder with respect to the total weight of the
pharamaceutical composition.
The term "lubricant" as used herein is defined as an agent able to decrease
adhesion of a powder to punches and friction between particles. The lubricant may be
present in the pharmaceutical composition in the form of a single compound or in the
form of a mixture of compounds.
Examples of lubricants are talc, magnesium stearate or calcium stearate.
Preferred lubricant according to the present invention is magnesium stearate.
Usually, the pharmaceutical composition according to the present invention
comprises 0.0 to 0.75% per weight of lubricant with respect to the total weight of the
pharmaceutical composition.
Particularly, the pharmaceutical composition according to the present invention
comprises 0.0 to 0.50% per weight of lubricant with respect to the total weight of the
pharmaceutical composition.
The pharmaceutical composition according to the present invention comprises
preferably 0.05 to 0.25 % per weight of lubricant, more preferably 0.08 to 0.15 % per
weight of lubricant, most preferably 0.11 % per weight of lubricant with respect to the
total weight of the pharmaceutical composition.
The pharmaceutical composition according to the present invention presents an
increased stability in time of the release of levetiracetam as active ingredient compared
to known pharmaceutical compositions comprising levetiracetam. Particularly, the
pharamaceutical composition according to the present invention presents an increased
stability in time of the release of levetiracetam as active ingredient compared to
pharmaceutical compositions comprising levetiracetam manufactured by conventional
processes, for example wet granulation process.
Preferably, the pharmaceutical composition according to the present invention
ensures substantially stable release of the active ingredient as time goes by.
In one embodiment, the pharmaceutical composition according to the present
invention comprises at least 2.0 to 9.0% per weight of sodium croscarmellose with
respect to total weight of the pharmaceutical composition.
In another embodiment, the pharmaceutical composition according to the present
invention comprises at least 0,0 to 3.0% per weight of anhydrous colloidal silica with
respect to total weight of the pharmaceutical composition.
In yet another embodiment, the pharmaceutical composition according to the
present invention comprises 0.5 to 6.0 % per weight of polyethylene glycol 6000 with
respect to total weight of the pharmaceutical composition.
In a further embodiment, the pharmaceutical composition according to the
present invention comprises 0.0 to 1.0 % per weight of magnesium stearate with respect
to total weight of the pharmaceutical composition.
Usually, the present invention relates to a pharmaceutical composition
comprising levetiracetam as active ingredient and
2.0 to 9.0 % per weight of disintegrant,
0.0 to 3.0 % per weight of gliding agent,
0.5 to 4.0% per weight of binder, and
0.0 to 0.75 % per weight of lubricant,
with respect to the total weight of the pharmaceutical composition.
Particularly, the present invention relates to a pharmaceutical composition
comprising levetiracetam as active ingredient and
2.0 to 9.0 % per weight of disintegrant,
0.0 to 3.0 % per weight of gliding agent,
0.5 to 2.5% per weight of binder, and
0.0 to 0.50 % per weight of lubricant,
with respect to the total weight of the pharmaceutical composition.
Preferably, the present invention relates to a pharmaceutical composition
comprising levetiracetam as active ingredient and
3.0 to 7.0 % per weight of disintegrant,
0.5 to 2.5 % per weight of gliding agent,
0.7 to 1.8 % per weight of binder, and
0.05 to 0.25 % per weight of lubricant,
with respect to the total weight of the pharmaceutical composition.
More preferably, the present invention relates to a pharmaceutical composition
comprising levetiracetam as active ingredient and
3.0 to 5.0 % per weight of disintegrant,
1.0 to 2.0 % per weight of gliding agent,
0.8 to 1.6 % per weight of binder, and
0.08 to 0.15 % per weight of lubricant,
with respect to the total weight of the pharmaceutical composition.
Usually, the pharmaceutical composition according to the present invention
comprises 80 to 95 % per weight of levetiracetam. preferably 85 to 93 % per weight of
levetiracetam, more preferably 90 to 92 % per weight of levetiracetam with respect to
the total weight of the pharmaceutical composition.
In a particular embodiment, the present invention relates to a pharmaceutical
composition comprising levetiracetam as active ingredient and
2.0 to 9.0 % per weight of sodium croscarmellose,
0.0 to 3.0 % per weight of anhydrous colloidal silica,
0.5 to 6.0 % per weight of polyethylene glycol 6000, and
0.0 to 1.0 % per weight of magnesium stearate,
with respect to the total weight of the pharmaceutical composition.
Usually, in this particular embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
2.0 to 9.0 % per weight of sodium croscarmellose,
0.0 to 3.0 % per weight of anhydrous colloidal silica,
0.5 to 4.0 % per weight of polyethylene glycol 6000, and
0.0 to 0.75 % per weight of magnesium stearate,
with respect to the total weight of the pharmaceutical composition.
Particularly, in this particular embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
2.0 to 9.0 % per weight of sodium croscarmellose,
0.0 to 3.0 % per weight of anhydrous colloidal silica,
0.5 to 2.5 % per weight of polyethylene glycol 6000, and
0.0 to 0.50 % per weight of magnesium stearate,
with respect to the total weight of the pharmaceutical composition
Preferably, in this particular embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
3.0 to 7.0 % per weight of sodium croscarmellose,
0.5 to 2.5 % per weight of anhydrous colloidal silica,
0.7 to 1.8 %per weight of polyethylene glycol 6000, and
0.05 to 0.25 % per weight of magnesium stearate
with respect to the total weight of the pharmaceutical composition.
More preferably, in this particular embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
3.0 to 5.0 % per weight of sodium croscarmellose,
1.0 to 2.0 % per weight of anhydrous colloidal silica,
0.8 to 1.6 % per weight of polyethylene glycol 6000, and
0.08 to 0.15 % per weight of magnesium stearate.
In a further particular embodiment, the present invention relates to a
pharmaceutical composition comprising
80 to 95% per weight of levetiracetam,
2.0 to 9.0 % per weight of sodium croscarmellose,
0.0 to 3.0 % per weight of anhydrous colloidal silica,
0.5 to 6.0 % per weight of polyethylene glycol 6000, and
0.0 to 1.0 % per weight of magnesium stearate,
with respect to the total weight of the pharmaceutical composition.
Usually, in this further particular embodiment, the present invention relates to a
pharmaceutical composition comprising
80 to 95% per weight of levetiracetam
2.0 to 9.0 % per weight of sodium croscarmellose,
0.0 to 3.0 % per weight of anhydrous colloidal silica,
0.5 to 4.0 %per weight of polyethylene glycol 6000, and
0.0 to 0.75 % per weight of magnesium stearate
with respect to the total weight of the pharmaceutical composition.
Particularly, in this further particular embodiment, the present invention relates
to a pharmaceutical composition comprising
80 to 95% per weight of levetiracetam
2.0 to 9.0 % per weight of sodium croscarmellose,
0.0 to 3.0 % per weight of anhydrous colloidal silica,
0.5 to 2.5 % per weight of polyethylene glycol 6000, and
0.0 to 0.50 % per weight of magnesium stearate
with respect to the total weight of the pharmaceutical composition.
Preferably, in this further particular embodiment, the present invention relates to
a pharmaceutical composition comprising
85 to 93% per weight of levetiracetam
3.0 to 7.0 % per weight of sodium croscarmellose,
0.5 to 2.5 % per weight of anhydrous colloidal silica,
0.7 to 1.8 %per weight of polyethylene glycol 6000, and
0.05 to 0.25 % per weight of magnesium stearate
with respect to the total weight of the pharmaceutical composition.
More preferably, in this further particular embodiment, the present invention
relates to a pharmaceutical composition comprising
90 to 92 % per weight of levetiracetam,
3.0 to 5.0 % per weight of sodium croscarmellose,
1.0 to 2.0 % per weight of anhydrous colloidal silica,
0.8 to 1.6 % per weight of polyethylene glycol 6000, and
0.08 to 0.15 % per weight of magnesium stearate.
In one embodiment of the present invention, the sum of disintegrant, gliding
agent, binder and lubricant present in the pharmaceutical composition comprising
levetiracetam as active ingredient is less than or equal to 20 % per weight, preferably
less than or equal to 15 % per weight, more preferably less than or equal to 10 % per
weight with respect to the total weight of the pharmaceutical composition.
Said values for the sum of disintegrant, gliding agent, binder and lubricant
present the further advantage of reducing the size and weight of the pharmaceutical
composition for a given quantity of active ingredient thereby increasing the ease of
administration to a patient.
Most preferably, the sum of sodium croscarmellose, anhydrous colloidal silica,
polyethylene glycol 6000, and magnesium stearate present in the pharmaceutical
composition comprising levetiracetam according to the present invention is less than 10
% per weight with respect to the total weight of the pharmaceutical composition.
The pharmaceutical composition according to the present invention is preferably
administered orally.
The pharmaceutical composition according to the present invention is preferably
in the form of a solid, more preferably in the form of a tablet.
The tablet may be uncoated or coated with a coating agent.
In one embodiment, the pharmaceutical composition according to the present
invention comprises 1.0 to 6.0% per weight of coating agent, preferably 2.0 to 5.0% per
weight of coating agent, more preferably 2.5 to 4.5 % per weight of coating agent, most
preferably 2.9% per weight of coating agent with respect to the total weight of the
pharmaceutical composition.
In a preferred embodiment, the present invention relates to a pharmaceutical
composition comprising levetiracetam as active ingredient and
2.0 to 9,0% per weight of disintegrant,
0 to 3.0% per weight of gliding agent,
0.5 to 6.0% per weight of binder,
0.0 to 1.0% per weight of lubricant, and
1.0 to 6.0 % per weight of a coating agent,
with respect to the total weight of the pharmaceutical composition.
Usually, in this preferred embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
2.0 to 9.0% per weight of disintegrant,
0 to 3.0% per weight of gliding agent,
0.5 to 4.0% per weight of binder,
0.0 to 0.75% per weight of lubricant, and
1.0 to 6.0 % per weight of a coating agent,
with respect to the total weight of the pharmaceutical composition.
Particularly, in this preferred embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
2.0 to 9.0% per weight of disintegrant,
0 to 3.0% per weight of gliding agent,
0.5 to 2.5% per weight of binder,
0.0 to 0.50% per weight of lubricant, and
1.0 to 6.0 % per weight of a coating agent,
with respect to the total weight of the pharmaceutical composition.
Preferably, in this preferred embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
3.0 to 7.0 % per weight of disintegrant,
0.5 to 2.5 % per weight of gliding agent,
0.7 to 1.8 % per weight of binder,
0.05 to 0.25 % per weight of lubricant, and
2.0 to to 5.0% per weight of coating agent
with respect to the total weight of the pharmaceutical composition.
More preferably, in this preferred embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
3.0 to 5.0 % per weight of disintegrant,
1.0 to 2.0 % per weight of gliding agent,
0.8 to 1.6 % per weight of binder,
0.08 to 0.15 % per weight of lubricant, and
2.5 to 4.5 % of coating agent,
with respect to the total weight of the pharmaceutical composition.
Examples of coating agents are ethylcellulose, hydroxypropylmethylcellulose
and methacrylic acid-alkyl acrylate copolymers.
Preferred coating agents are hydroxypropylmethylcellulose aqueous dispersions.
More preferred coating agent according to the present invention is Opadry®.
Opadry® is a hydroxypropylmethylcellulose aqueous dispersion. Examples of
Opadry® are Opadry® 85F20694, Opadry® 85F32004, Opadry® 85F23452 and
Opadry® 85F18422.
The coating agent preferably comprises polyvinyl alcohol (PVA) which coating
agent ensures a better gliding of the tablets upon packaging. More preferably, the
coating agent comprises partially hydrolyzed polyvinyl alcohol.
The presence of polyvinyl alcohol in the coating agent may also ensure a better
adhesion of the coating to the tablet. Moreover, higher concentrations of coating agents
may be used.
In another embodiment, the pharmaceutical composition according to the present
invention comprises 1.0 to 6.0% per weight of coating agent comprising polyvinyl
alcohol, preferably 2.0 to 5.0% per weight of coating agent comprising polyvinyl
alcohol, more preferably 2.5 to 4.5 % per weight of coating agent comprising polyvinyl
alcohol, most preferably 2.9% per weight of coating agent comprising polyvinyl alcohol
with respect to the total weight of the pharmaceutical composition.
In this embodiment, the polyvinyl alcohol is preferably partially hydrolyzed.
In a particular embodiment according to the present invention, the sum of
disintegrant, gliding agent, binder, lubricant and coating agent present in the
pharamaceutical composition comrprising levetiracetam as active ingredient is less than
or equal to 20 % per weight, preferably less than or equal to 15 % per weight, more
preferably less than or equal to 10 % per weight with respect to the total weight of the
pharmaceutical composition.
In a more preferred embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
2.0 to 9.0 % per weight of sodium croscarmellose,
0.0 to 3.0 % per weight of anhydrous colloidal silica,
0.5 to 6.0 % per weight of polyethylene glycol 6000, and
0.0 to 1.0 % per weight of magnesium stearate,
1.0 to 6.0% per weight of Opadry®,
with respect to the total weight of the pharmaceutical composition.
Usually, in this more preferred embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
2.0 to 9.0 % per weight of sodium croscarmellose,
0.0 to 3.0 % per weight of anhydrous colloidal silica,
0.5 to 4.0 % per weight of polyethylene glycol 6000, and
0.0 to 0.75 % per weight of magnesium stearate,
1.0 to 6.0% per weight of Opadry®,
with respect to the total weight of the pharmaceutical composition.
Particularly, in this more preferred embodiment, the present invention relates to
a pharmaceutical composition comprising levetiracetam as active ingredient and
2.0 to 9.0 % per weight of sodium croscarmellose,
0.0 to 3.0 % per weight of anhydrous colloidal silica,
0.5 to 2.5 % per weight of polyethylene glycol 6000, and
0.0 to 0.50 % per weight of magnesium stearate,
1.0% to 6.0% per weight of Opadry®,
with respect to the total weight of the pharmaceutical composition.
Preferably, in this more preferred embodiment, the present invention relates to a
pharmaceutical composition comprising levetiracetam as active ingredient and
3.0 to 7.0 % per weight of sodium croscarmellose,
0.5 to 2.5 % per weight of anhydrous colloidal silica,
0.7 to 1.8 %per weight of polyethylene glycol 6000,
0.05 to 0.25 % per weight of magnesium stearate, and
2.0 to 5.0% per weight of Opadry®,
with respect to the total weight of the pharmaceutical composition.
More preferably, in this more preferred embodiment, the present invention
relates to a pharmaceutical composition comprising levetiracetam as active ingredient
and
3.0 to 5.0 % per weight of sodium croscarmellose,
1.0 to 2.0 % per weight of anhydrous colloidal silica,
0.8 to 1.6 % per weight of polyethylene glycol 6000,
0.08 to 0.15 % per weight of magnesium stearate, and
2.5 to 4.5% per weight of Opadry®,
with respect to the total weight of the pharmaceutical composition.
In the above mentioned pharmaceutical compositions, Opadry® preferably
comprises polyvinyl alcohol. More preferably, Opadry® comprises partially hydrolyzed
polyvinyl alcohol.
In another particular embodiment, the sum of sodium croscarmellose, anhydrous
colloidal silica, polyethylene glycol 6000, magnesium stearate and Opadry® in the
pharmaceutical composition comprising levetiracetam is less than 10% per weight with
respect to the total weight of the pharmaceutical composition.
Optionally, the pharmaceutical composition according to the present invention
may contain a diluent or filler.
The term "diluent" or "filler" as used herein is defined as an inert agent designed
to increase the weight and/or the size of the pharmaceutical composition, for example in
the case of a tablet.
The diluent or the filler may be present in the pharmaceutical composition hi the
form of a single compound or in the form of a mixture of compounds.
Preferably the diluent of the filler is added when the amount of the active
ingredient and the other excipients is too small to obtain a tablet of suitable size.
Examples of diluents or fillers according to the present invention are starches,
lactose, mannitol, sugars or mineral salts.
Percentages per weight of diluent or filler necessary to obtain a pharmaceutical
composition according to the present invention will be determined according to
conventional methods known to the person skilled in the art.
Optionally, the pharmaceutical composition according to the present invention
may contain a sweetening agent such as sucrose or saccharine, a coloring agent or a
flavoring agent.
Optionally, the pharmaceutical composition according to the present invention
may comprise a taste-masking agent.
Preferably, the pharmaceutical composition according to the present invention
comprises a coating agent which has taste-masking properties.
Generally, existing pharmaceutical composition comprising levetiracetam are
manufactured by a wet granulation process according to conventional methods known
to the man skilled in the art.
Such a wet granulation process may cause degradation of the active ingredient
upon contact with the liquid phase. Furthermore, such a process requires a drying step
which is time consuming and, due to the presence of a heat source, increases costs of
production.
Therefore, in another aspect, the present invention relates to a process of
manufacturing a pharmaceutical composition comprising levetiracetam as active
ingredient and
2.0 to 9.0% per weight of disintegrant,
0 to 3.0% per weight of gliding agent,
0.5 to 6.0% per weight of binder, and
0.0 to 1.0% per weight of lubricant,
with respect to the total weight of the pharmaceutical composition,
which process comprises the steps of:
i) mixing levetiracetam, the gliding agent, the disintegrant and the binder,
ii) adding the lubricant,
iii) mixing levetiracetam, the gliding agent, the disintegrant, the binder and
the lubricant;
iv) compacting the mixture obtained in step iii),
v) grinding the mixture obtained in step iv), and
vi) compressing the mixture obtained hi step v).
The term "compacting" as used herein is defined as the transformation of a
powder into a coherent specimen of a defined shape by compression (eg by a roller
compacter).
The term "grinding" as used herein is defined as the reduction of the particle size
by sieving.
The term "compressing" as used herein is defined as the application of a
sufficient force by the punches of a tablet press on a powder to compact it into a tablet.
Preferably, at least one of levetiracetam, disintegrant, gliding agent or binder
undergoes desagglomeration prior to mixing.
The term "desagglomeration" as used herein is defined as the disruption of
agglomerates in the powder.
Preferably, the grinding step is achieved on a sieve of less than 5 mm, more
preferably less than 3 mm, most preferably on a sieve of 1.5 mm.
The process according to the present invention comprises fewer steps than the
wet granulation process thus ensuring lower costs of production. Furthermore, said
process avoids degradation of the active ingredient upon contact with a liquid phase.
Preferably, the process comprises a further coating step in which water,
preferably purified water, is added to the coating agent and resulting suspension is
sprayed on the mixture resulting from step vi).
Preferred coating agent is Opadry®. More preferred coating agent is selected
from Opadry® 85F20694, Opadry® 85F32004, Opadry® 85F23452 and Opadry®
85F18422. Most preferred coating agent comprises polyvinyl alcohol.
The present invention further relates to a process of manufacturing
pharmaceutical compositions comprising preferred, more preferred and most preferred
percentages per weight of levetiracetam, disintegrant, gliding agent, binder, lubricant
and coating agent as defined above for these pharmaceutical compositions, which
process comprises steps i) to vi) as defined here above.
In a preferred embodiment, the present invention relates to a process of
manufacturing a pharmaceutical composition comprising levetiracteam as active
ingredient and
2.0 to 9.0% per weight of sodium croscarmellose,
0.0 to 3.0% per weight of anhydrous colloidal silica,
0.5 to 6.0% per weight of polyethylene glycol 6000, and
0.0 to 1.0% per weight of magnesium stearate,
with respect to the total weight of the pharmaceutical composition,
which process comprises the steps of:
i) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose,
polyethylene glycol 6000,
ii) adding magnesium stearate,
iii) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose,
polyethylene glycol 6000 and magnesium stearate;
iv) compacting mixture obtained in step iii),
v) grinding mixture obtained in step iv), and
vi) compressing mixture obtained in step v).
In a more preferred embodiment, the present invention relates to a process of
manufacturing a pharmaceutical composition comprising levetiracetam as active
ingredient and
2.0 to 9.0% per weight of sodium croscarmellose,
0.0 to 3.0% per weight of anhydrous colloidal silica,
0.5 to 6.0% per weight of polyethylene glycol 6000,
0.0 to 1.0% per weight of magnesium stearate,
1.0 to 6.0 % per weight of Opadry®
with respect to the total weight of the pharmaceutical composition,
which process comprises the steps of:
i) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose,
polyethylene glycol 6000,
ii) adding magnesium stearate,
iii) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose,
polyethylene glycol 6000 and magnesium stearate;
iv) compacting mixture obtained in step iii),
v) grinding mixture obtained in step iv),
vi) compressing mixture obtained in step v), and
vii) spraying onto the mixture obtained in step vi) a suspension of
hydroxypropylmethylcellulose comprising Opadry®.
In this more preferred embodiment, Opadry® preferably comprises polyvinyl
alcohol.
The present invention further relates to a process of manufacturing
pharmaceutical compositions comprising usual, particular, preferred, more preferred
and most preferred percentages per weight of levetiracetam, sodium croscarmellose,
anhydrous colloidal silica, polyethylene glycol 6000, magnesium stearate and Opadry®
as defined above for these pharmaceutical compositions, which process comprises steps
i) to vii) as defined here above.
In another aspect the present invention relates to a pharmaceutical composition
comprising levetiracetam and
2.0 to 9.0% per weight of disintegrant,
0 to 3.0% per weight of gliding agent,
0.5 to 6.0% per weight of binder, and
0.0 to 1.0% per weight of lubricant,
with respect to the total weight of the pharmaceutical composition,
useful for the treatment or prevention of a disease.
By the term "disease", we understand a disease selected from the group
consisiting of epileptogenesis, seizure disorders, convulsions, Parkinson's disease,
dyskinesia induced by dopamine replacement therapy, tardive dyskinesia induced by
administration of neuroleptic drugs, Huntington Chorea, and other neurological
disorders including bipolar disorders, mania, depression, anxiety, attention deficit
hyperactivity disorder (ADHD), migraine, trigeminal and other neuralgia, chronic pain,
neuropathic pain, cerebral ischemia, cardiac arrhythmia, myotonia, cocaine abuse,
stroke, myoclonus, tremor, essential tremor, simple or complex tics, Tourette syndrome,
restless leg syndrome and other movement disorders, neonatal cerebral haemorrhage,
amyotrophic lateral sclerosis, spasticity and degenerative diseases, bronchial asthma,
asthmatic status and allergic bronchitis, asthmatic syndrome, bronchial hyperreactivity
and bronchospastic syndromes as well as allergic and vasomotor rhinitis and
rhinoconjunctivitis.
The term "treatment" as used herein, includes curative treatment and
prophylactic treatment.
By "curative" is meant efficacy in treating a current symptomatic episode of a
disorder or condition.
By "prophylactic" is meant prevention of the occurrence or recurrence of a
disorder or condition.
The present invention concerns also a method for treatment of a human patient
by using the pharmaceutical composition.
The present invention concerns also the pharmaceutical composition for use as a
medicament for curing the said disease.
The present invention concerns also the use of the pharmaceutical composition
for the manufacture of a medicament for a therapeutic application in the said disease.
Preferably said disease is selected from the group consisting essentially of
epilepsy, Parkinson's disease, dyskinesia, migraine, tremor, essential tremor, bipolar
disorders, chronic pain, neuropathic pain, or bronchial, asthmatic or allergic conditions.
More preferably said disease is epilepsy.
The present invention concerns also a method for manufacturing a medicament
intended for therapeutic application in the said disease, characterized in that the
pharmaceutical composition according to the present invention is used.
The present invention is also directed to methods of treating humans to alleviate
disease by the administration of the pharmaceutical composition.
Figure 1 shows a flow chart of the process according to the present invention.
Figure 2 shows a flow chart of the wet granulation process.
Figure 3 shows comparative dissolution kinetics for pharmaceutical composition
A of example 1 according to our invention and known pharmaceutical composition E of
example 2 immediately after manufacturing.
Figure 4 shows comparative dissolution kinetics for pharmaceutical composition
A of example 1 according to our invention and known pharmaceutical composition E of
example 2 six months after manufacturing.
Figure 5 shows comparative dissolution kinetics for pharmaceutical composition
B of example 1 according to our invention and known pharmaceutical composition F of
example 2 immediately after manufacturing.
Figure 6 shows comparative dissolution kinetics for pharmaceutical composition
B of example 1 according to our invention and known pharmaceutical composition F of
example 2 six months after manufacturing.
Figure 7 shows comparative dissolution kinetics for pharmaceutical composition
C of example 1 according to our invention and known pharmaceutical composition G of
example 2 immediately after manufacturing.
Figure 8 shows comparative dissolution kinetics for pharmaceutical composition
C of example 1 according to our invention and known pharmaceutical composition G of
example 2 six months after manufacturing.
Figure 9 shows comparative dissolution kinetics for pharmaceutical composition
D of example 1 according to our invention and known pharmaceutical composition H of
example 2 immediately after manufacturing.
Figure 10 shows comparative dissolution kinetics for pharmaceutical
composition D of example 1 according to our invention and known pharmaceutical
composition H of example 2 six months after manufacturing.
The following examples are provided for illustrative purposes only and are not
intended, nor should they be construed, as limiting the invention in any manner. Those
skilled in the art will appreciate that routine variations and modifications of the
following examples can be made without exceeding the spirit or scope of the invention.
EXAMPLES
Example 1
Table I shows four pharmaceutical compositions (A, B, C and D) with different
quantities of active ingredient levetiracetam which were manufactured according to the
process disclosed in figure 1, referred to as dry granulation process.
(Table Removed)
Example 2
Table II shows four pharmaceutical compositions (E, F, G and H) with different
quantities of active ingredient levetiracetam which were manufactured according to the
process disclosed in figure 2, referred to as wet granulation process. These compositions
are not within the scope of the present invention and have been manufactured for
comparative study.
(Table Removed)
Example 3
Kinetics of release of active ingredient have been measured for compositions A
to H. These kinetics have been measured for all compositions immediately after
manufacturing and six months after manufacturing. During these six months, the
pharmaceutical compositions have been kept under blister at 40°C and at a level of
relative humidity of 75%.
The dissolution tests are made in an USP Apparatus 2 (paddle apparatus),
volume 900 mL, speed 50 rpm, and temperature 37°C.
Figures 3 to 10 show that for pharmaceutical compositions manufactured
according to the dry granulation process, pourcentages of dissolution are more stable
than for compositions manufactured according to the wet granulation process. This
suggests that pharmaceutical compositions A to D are more stable in time than
pharmaceutical compositions E to H.
Example 4
The six following pharmaceutical compositions were manufactured according to
the process disclosed in figure 1, referred to as dry granulation process.
Composition I comprises 1000 mg of levetiracetam, 40 mg of
polyvinylpolypyrrolidone, 60 mg of sorbitol and 5 mg of magnesium stearate.
Composition J comprises 1000 mg of levetiracetam, 30 mg of sodium
carboxymethylcellulose, 30 mg of starch, 30 mg of macrogol and 1 mg of magnesium
stearate.
Composition K comprises 1000 mg of levetiracetam, 40 mg of sodium
croscarmellose, 60 mg of microcrystalline cellulose, 5 mg of colloidal silica and 5 mg
of calcium stearate.
Composition L comprises 1000 mg of levetiracetam, 40 mg of
polyvinylpolypyrrolidone, 10 mg of colloidal silica, 15 mg of talc and 20 mg of
macrogol.
Composition M comprises 1000 mg of levetiracetam, 37.5 mg of sodium starch
glycolate, 10 mg of colloidal silica, 20 mg of macrogol and 1.25 mg of magnesium
stearate.
Composition N comprises 1000 mg of levetiracetam, 30 mg of
polyvinylpolypyrrolidone, 20 mg of colloidal silica, 60 mg of mannitol and 5 mg of
magnesium stearate.
These compositions were coated with hydroxypropylmethylcellulose aqueous
dispersions or polyvinyl alcohol aqueous dispersions.
These 6 compositions are stable.

CLAIMS
1. A pharmaceutical composition comprising levetiracetam as active ingredient and
2.0 to 9.0% per weight of disintegrant,
0.0 to 3.0% per weight of gliding agent,
0.5 to 6.0% per weight of binder, and
0.0 to 1.0% per weight of lubricant,
with respect to the total weight of the pharmaceutical composition.
2. The pharmaceutical composition according to claim 1 comprising 3.0 to 7.0% per
weight of disintegrant with respect to the total weight of the pharmaceutical
composition.
3. The pharmaceutical composition according to any preceding claim comprising 3.0
to 5.0% per weight of disintegrant with respect to the total weight of the
pharmaceutical composition.
4. The pharmaceutical composition according to any preceding claim comprising 0.5
to 2.5% per weight of gliding agent with respect to the total weight of the
pharmaceutical composition.
5. The pharmaceutical composition according to any preceding claim comprising 1.0
to 2.0% per weight of gliding agent with respect to the total weight of the
pharmaceutical composition.
6. The pharmaceutical composition according to any preceding claim comprising 0.5
to 4.0 % per weight of binder with respect to the toatl weight of the pharmaceutical
composition.
7. The pharmaceutical composition according to any preceding claim comprising 0.5
to 2.5% per weight of binder with respect to the total weight of the pharmaceutical
composition.
8. The pharmaceutical composition according to any preceding claim comprising 0.7
to 1.8% per weight of binder with respect to the total weight of the pharmaceutical
composition.
9. The pharmaceutical composition according to any preceding claim comprising 0.8
to 1.6% per weight of binder with respect to the total weight of the pharmaceutical
composition.
10. The pharmaceutical composition according to any preceding claim comprising 0.0
to 0.75% per weight of lubricant with respect to the total weight of the
pharmaceutical composition.
11. The pharmaceutical composition according to any preceding claim comprising 0.0
to 0.50% per weight of lubricant with respect to the total weight of the
pharmaceutical composition.
12. The pharmaceutical composition according to any preceding claim comprising
0.05 to 0.25% per weight of lubricant with respect to the total weight of the
pharmaceutical composition.
13. The pharmaceutical composition according to any preceding claim comprising
0.08 to 0.15% per weight of lubricant with respect to the total weight of the
pharmaceutical composition.
14. The pharmaceutical composition according to any preceding claim wherein the
sum of disintegrant, gliding agent, binder and lubricant is less than or eqaul to 20%
per weight with respect to the total weight of the pharmaceutical composition.
15. The pharmaceutical composition according to any preceding claim wherein the
disintegrant is sodium croscarmellose.
16. The pharmaceutical composition according to any preceding claim wherein the
gliding agent is anhydrous colloidal silica.
17. The pharmaceutical composition according to any preceding claim wherein the
binder is polyethylene glycol 6000.
18. The pharmaceutical composition according to any preceding claim wherein the
lubricant is magnesium stearate.
19. The pharmaceutical composition according to any preceding claim comprising 2.0
to 9.0% per weight of sodium croscarmellose with respect to total weight of the
pharmaceutical composition.
20. The pharmaceutical composition according to any preceding claim comprising 0.0
to 3.0 % per weight of anhydrous colloidal silica with respect to total weight of the
pharmaceutical composition.
21. The pharmaceutical composition according to any preceding claim comprising 0.5
to 6.0% per weight of polyethylene glycol 6000 with respect to total weight of the
pharmaceutical composition.
22. The pharmaceutical composition according to any preceding claim comprising 0.0
to 1.0% per weight of magnesium stearate with respect to total weight of the
pharmaceutical composition.
23. The pharmaceutical composition according to any preceding claim which
comprises 80 % to 95% per weight of levetiracetam
24. The pharmaceutical composition according to any preceding claim which
comprises a coating agent.
25. The pharmaceutical composition according to claim 24 wherein the coating agent
comprises polyvinyl alcohol.
26. The pharmaceutical composition according to any one of claims 24 and 25 wherein
the coating agent is hydroxypropylmethylcellulose aqueous dispersions
(Opadry®).
27. The pharmaceutical composition according to any preceding claim which is a
tablet.
28. A process of manufacturing a pharmaceutical composition comprising
levetiracetam as active ingredient and
2.0 to 9.0% per weight of disintegrant,
0 to 3.0% per weight of gliding agent,
0.5 to 6.0% per weight of binder, and
0.0 to 1.0% per weight of lubricant,
with respect to the total weight of the pharmaceutical composition,
which process comprises the steps of:
i) mixing levetiracetam, the gliding agent, the disintegrant and the binder,
ii) adding the lubricant,
iii) mixing levetiracetam, the gliding agent, the disintegrant, the binder and
the lubricant;
iv) compacting the mixture obtained in step iii),
v) grinding the mixture obtained in step iv), and
vi) compressing the mixture obtained in step v).
29. A process of manufacturing a pharmaceutical composition according to claim 28
comprising levetiracteam as active ingredient and
2.0 to 9.0% per weight of sodium croscarmellose,
0.0 to 3.0% per weight of anhydrous colloidal silica,
0.5 to 6.0% per weight of polyethylene glycol 6000, and
0.0 to 1.0% per weight of magnesium stearate,
with respect to the total weight of the pharmaceutical composition,
which process comprises the steps of:
i) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose,
polyethylene glycol 6000,
ii) adding magnesium stearate,
iii) mixing levetiracetam, anhydrous collidal silica, sodium croscarmellose,
polyethylene glycol 6000 and magnesium stearate;
iv) compacting mixture obtained hi step iii),
v) grinding mixture obtained in step iv), and
vi) compressing mixture obtained in step v).
30. A process according to claim 29 comprising spraying onto the mixture obtained hi
step vi) a coating agent which is a suspension of hydroxypropylmethylcellulose
comprising Opadry®.
31. A process according to claim 30 wherein the coating agent comprises
polyvinylalcohol.
32. A pharmaceutical composition comprising levetiracetam and
2.0 to 9.0% per weight of disintegrant,
0 to 3.0% per weight of gliding agent,
0.5 to 6.0% per weight of binder, and
0.0 to 1.0% per weight of lubricant,
with respect to the total weight of the pharmaceutical composition for the treatment
of of epilepsy, Parkinson's disease, dyskinesia, migraine, tremor, essential tremor,
bipolar disorders, chronic pain, neuropathic pain, or bronchial, asthmatic or allergic
conditions
33. Use of a pharmaceutical composition according to any one of claims 1 to 27 for the
manufacture of a medicament for the treatment of of epilepsy, Parkinson's disease,
dyskinesia, migraine, tremor, essential tremor, bipolar disorders, chronic pain,
neuropathic pain, or bronchial, asthmatic or allergic conditions.

Documents:

2385-delnp-2007-Abstract-(11-09-2013).pdf

2385-delnp-2007-abstract.pdf

2385-delnp-2007-claims.pdf

2385-delnp-2007-Correspondence Others-(11-09-2013).pdf

2385-delnp-2007-Correspondence Others-(26-05-2014).pdf

2385-delnp-2007-Correspondence Others-(27-12-2013).pdf

2385-delnp-2007-correspondence-others.pdf

2385-delnp-2007-description (complete).pdf

2385-delnp-2007-Drawings-(11-09-2013).pdf

2385-delnp-2007-drawings.pdf

2385-delnp-2007-form-1.pdf

2385-delnp-2007-Form-18-(14-05-2009).pdf

2385-delnp-2007-Form-2-(11-09-2013).pdf

2385-delnp-2007-form-2.pdf

2385-delnp-2007-Form-3-(11-09-2013).pdf

2385-delnp-2007-Form-3-(26-05-2014).pdf

2385-delnp-2007-Form-3-(27-12-2013).pdf

2385-delnp-2007-form-3.pdf

2385-delnp-2007-form-5.pdf

2385-delnp-2007-GPA-(11-09-2013).pdf

2385-delnp-2007-pct-210.pdf

2385-delnp-2007-pct-237.pdf

2385-delnp-2007-pct-304.pdf

2385-delnp-2007-pct-306.pdf

2385-delnp-2007-Petition-137-(11-09-2013).pdf

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Patent Number

263346

Indian Patent Application Number

2385/DELNP/2007

PG Journal Number

43/2014

Publication Date

24-Oct-2014

Grant Date

21-Oct-2014

Date of Filing

29-Mar-2007

Name of Patentee

UCB PHARMA S.A.

Applicant Address

60 ALLEE DE LA RECHERCHE, B-1070 BRUXELLES, BELGIUM.

Inventors:

#	Inventor's Name	Inventor's Address
1	MICHEL DELEERS	12 SQUARE DES BRAVES, B-1630 LINKEBEEK, BELGIUM.
2	JEAN-BENOIT HUBERT	84, HOOGKOUTERBAAN, B-9450 HAALTERT, BELGIUM.

PCT International Classification Number

A61K 9/20

PCT International Application Number

PCT/EP2006/007260

PCT International Filing date

2006-07-24

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	05016189.2	2005-07-25	EUROPEAN UNION
2	05016945.7	2005-08-04	EUROPEAN UNION