Controlled release bupropion formulation

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/14 (2006.01) A61K 9/20 (2006.01) A61K 9/52 (2006.01) A61K 9/58 (2006.01) A61K 9/50 (2006.01)

Patent

CA 2363168

A controlled release dosage form of bupropion hydrochloride which comprises: (a) a first pellet having a core of bupropion hydrochloride and hydroxypropyl methylcellulose at a weight ratio of 10:1 to 30:1 and a coating of a mixture of an acrylic resin which is soluble in acidic media and ethyl cellulose; (b) a second pellet having a core of bupropion hydrochloride and hydroxypropyl methylcellulose at a ratio of 10:1 to 30:1; an inner coating of a mixture of an acrylic resin which is soluble in acidic media and a water insoluble polymer and an outer coating which comprises an enteric coating polymer.

On décrit une forme posologique à libération contrôlée de bupropion qui contient : (a) un premier comprimé comprenant un noyau d'hydrochlorure de bupropion et d'hydroxypropylméthylcellulose suivant un rapport en poids compris entre 10 :1 et 30 :1 et un revêtement formé d'un mélange d'une résine acrylique qui est soluble dans un milieu acide et de l'éthylcellulose ; (b) un deuxième comprimé comprenant un noyau d'hydrochlorure de bupropion et d'hydroxypropylméthylcellulose suivant un rapport en poids compris entre 10 :1 et 30 :1 ; un revêtement interne formé d'un mélange d'une résine acrylique qui est soluble dans un milieu acide et d'un polymère insoluble dans l'eau et un revêtement externe qui contient un polymère d'enrobage gastro-résistant.

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