Osmotically driven dispenser and process for making same

Details Osmotically driven dispenser and process for making same Osmotically driven dispenser and process for making same

A - Human Necessities

61

M

128/104, 167/153

A61M 31/00 (2006.01) A61F 9/00 (2006.01) A61K 9/00 (2006.01)

Patent

CA 1098442

Abstract of the Disclosure Osmotically driven dispensers for dispensing an active agent to a liquid-containing environment are known. The present invention seeks to provide more effective osmotically driven dispensers. The present invention provides an osmotically driven dispenser for dispensing an osmotically effective active agent composition into a liquid-containing environment comprising a wall that is permeable to the liquid, is impermeable to the active agent composition, and that defines an inner compartment, an osmotically effective active agent composition contained within the compartment, and an outlet passageway through the wall from which the active agent composition is dispensed from the compartment to the environment characterized in that the wall is a laminate of a semipermeable lamina and a microporous lamina. The dispensers of the present invention have an improved structure providing greater resistance to physical and chemical degradation.

300637

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