Osmotic device within an osmotic device

A - Human Necessities – 61 – K

Patent

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Details

A61K 9/24 (2006.01) A61K 9/22 (2006.01)

Patent

CA 2396152

The delivery devices (20) described herein are capable of delivering one or more active substances by osmotic pumping through preformed passageways (26, 27). An osmotic device according to the invention includes a first osmotic device enclosed within a second osmotic device. The first osmotic device includes drug- containing core (25) surrounded by a first semipermeable membrane (24). The second osmotic device includes a drug-containing composition (23) surrounding the first semipermeable membrane and a second semipermeable membrane (22) surrounding the drug-containing composition. The device can also include an external drug-containing composition (21). In some embodiments, the semipermeable membrane of one or both of the osmotic de-vices completely dissolves or degrades during use. This delivery device can include an immediate release outer coat.

Dispositifs d'administration (20) capables de libérer une ou plusieurs substances actives par pompage osmotique à travers des passages prédéterminés (26, 27). Ce type de dispositif présente un premier dispositif osmotique enfermé à l'intérieur d'un deuxième dispositif osmotique. Le premier dispositif osmotique comprend un noyau (25) contenant une substance médicamenteuse et entouré par une première membrane semi-perméable (24). Le deuxième dispositif osmotique comporte une composition (23) contenant une substance médicamenteuse et entourant la première membrane semi-perméable, et une deuxième membrane semi-perméable (22) entourant la composition contenant la substance médicamenteuse. Ce dispositif peut également inclure une composition extérieure (21) contenant une substance médicamenteuse. Dans quelques modes de réalisation, la membrane semi-perméable de l'un ou des deux dispositifs osmotiques se dissout complètement ou se dégrade pendant l'utilisation. Ce dispositif d'administration peut posséder un revêtement extérieur à libération immédiate.

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