Extended-release pharmaceutical formulations

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/22 (2006.01) A61K 9/26 (2006.01) A61K 9/32 (2006.01) A61K 9/48 (2006.01) A61K 9/54 (2006.01) A61K 9/58 (2006.01) A61K 31/37 (2006.01) A61K 47/30 (2006.01)

Patent

CA 2746855

The present invention provides matrix-forming, sustained-release pharmaceutical formulations comprising four primary components: i) an effective amount of at least one drug substance; ii) at least one pharmaceutically acceptable, water-swellable, pH independent polymer; iii) at least one pharmaceutically-acceptable, anionic, pH dependent polymer; and (iv) a pharmaceutically-acceptable polymer selected from the group consisting of a) at least one pharmaceutically-acceptable cationic polymer; and b) at least one pharmaceutically acceptable hydrocolloid. The present formulations can be used with compounds having a wide range of solubilities as well as compounds characterized as having hydrophobic or hydrophilic characteristics.

La présente invention porte sur des formulations pharmaceutiques à libération prolongée, formant une matrice et renfermant quatre composants primaires : i) une quantité efficace d'au moins une substance médicamenteuse ; ii) au moins un polymère indépendant du pH, gonflable par l'eau, pharmaceutiquement acceptable ; (iii) au moins un polymère dépendant du pH, anionique, pharmaceutiquement acceptable ; et (iv) un polymère pharmaceutiquement acceptable choisi dans le groupe constitué par a) au moins un polymère cationique pharmaceutiquement acceptable ; et b) au moins un hydrocolloïde pharmaceutiquement acceptable. Les présentes formulations peuvent être utilisées avec des composés présentant une large plage de solubilité, ainsi que des composés caractérisés comme présentant des caractéristiques hydrophobes ou hydrophiles.

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