Osmotic controlled release drug delivery device

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/22 (2006.01) A61K 9/00 (2006.01) A61K 9/32 (2006.01) A61K 9/36 (2006.01) A61K 31/00 (2006.01) A61K 31/496 (2006.01)

Patent

CA 2388159

The present invention is related to a pH insensitive drug delivery device, specifically an osmotic pump, for the controlled release of a beneficial agent in an environment of use, which comprises (a) a core prepared from an admixture comprising: (i) a therapeutically effective amount of at least one beneficial agent, or salts thereof, that has a solubility profile that is dependent on the pH level of the environment of use; and (ii) at least one pH modulating agent; and (b) a controlled porosity, microporous coating which surrounds the core. In a second embodiment, the invention is also related to a pH insensitive, osmotic drug delivery device for the controlled release of a beneficial agent in an environment of use, which comprises (a) a core containing a therapeutically effective amount of at least one beneficial agent, or salts thereof, that has a solubility profile that is dependent on the pH level of the environment of use; and b) a controlled porosity, microporous coating which surrounds the core and has at least one aperture.

L'invention concerne un dispositif d'administration de médicament insensible au pH, en particulier une pompe osmotique, destiné à la libération commandée d'un agent bénéfique dans un environnement d'utilisation. Ce dispositif comprend (a) un noyau préparé à partir d'un mélange contenant: (i) une quantité thérapeutiquement efficace d'au moins un agent bénéfique, ou des sels de celui-ci, présentant une solubilité qui dépend du niveau du pH de l'environnement d'utilisation; et (ii) au moins un régulateur de pH; et (b) un revêtement microporeux à porosité commandée entourant le noyau. Un second mode de réalisation concerne également un dispositif osmotique d'administration de médicament insensible au pH destiné à la libération commandée d'un agent bénéfique dans un environnement d'utilisation; ledit dispositif comprend (a) un noyau contenant une quantité thérapeutiquement efficace d'au moins un agent bénéfique, ou des sels de celui-ci, présentant une solubilité qui dépend du niveau du pH de l'environnement d'utilisation; et b) un revêtement microporeux à porosité commandée entourant le noyau et pourvu d'au moins une ouverture.

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