Volume efficient controlled release dosage form

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/00 (2006.01)

Patent

CA 2481236

The present invention includes a dosage form that facilitates the controlled release of an active agent at a desired release rate or release rate profile. In each embodiment, the dosage form of the present invention includes a bi- layer membrane system and an osmotic core. The bi-layer membrane system includes a semipermeable membrane and an osmosensitive membrane and forms an internal compartment that is occupied by the osmotic core. The osmotic core of the dosage form of the present invention includes and active agent composition and a light push layer. The dosage form of the present invention additionally includes a passageway that is formed through the bi-layer membrane system and permits expulsion of the active agent composition from the dosage form during operation. The bi-layer membrane system and the osmotic core of the dosage form of the present invention are formulated and formed to provide controlled release of the active agent included in the active agent composition of the osmotic core, while simultaneously facilitating increased loading of active agent within a dosage form of given dimension and increasing the delivery efficiency of such active agent relative to prior osmotic dosage forms including a push layer.

L'invention concerne une forme de dosage facilitant la libération contrôlée d'un agent actif à une vitesse ou selon un profil de libération désiré. Dans chaque mode de réalisation, la forme de dosage de l'invention comprend un système de membrane à deux couches et un noyau osmotique. Le système de membrane à deux couches comprend une membrane semi-perméable et une membrane osmosensible, et forme un compartiment interne occupé par le noyau osmotique. Ledit noyau osmotique comprend une composition d'agent actif et une couche d'expulsion légère. La forme de dosage comprend également un passage formé à travers le système de membrane à deux couches et permet l'expulsion de la composition d'agent actif à partir de la forme de dosage pendant une opération. Le système de membrane à deux couches et le noyau osmotique sont formulés et formés afin de produire une libération contrôlée de l'agent actif compris dans la composition d'agent actif du noyau osmotique, tout en facilitant simultanément l'augmentation de charge de cet agent actif dans une forme de dosage de dimension donnée et en augmentant l'efficacité de distribution dudit agent actif par rapport aux formes de dosage antérieures comprenant une couche d'expulsion.

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