Osmotic delivery system and method for decreasing start-up times for osmotic delivery systems
First Claim
1. An osmotic delivery device comprising:
- a reservoir having at least one drug delivery orifice;
an osmotic composition contained within the reservoir;
a drug formulation contained within the reservoir; and
a preloaded membrane comprising a semipermeable material and a liquid filler material contained within the semipermeable material, wherein the preloaded membrane is configured to allow a fluid to pass from an environment surrounding the reservoir into the osmotic composition.
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Accused Products
Abstract
The present invention includes devices and methods for reducing the start-up time of osmotically driven drug delivery systems capable of delivering a desired drug at a controlled rate over time. In particular, the present invention includes osmotic pumps that have a preloaded membrane, which includes a semipermeable material that has been preloaded with a nonaqueous, incompressible liquid filler that is miscible with water. The present invention further includes methods for making such osmotic pumps. The preloaded membranes included in the osmotic pumps according to the present invention have proven to provide significant decreases in average start-up times relative to osmotic pumps that include semipermeable membranes that are not preloaded.
118 Citations
31 Claims
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1. An osmotic delivery device comprising:
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a reservoir having at least one drug delivery orifice;
an osmotic composition contained within the reservoir;
a drug formulation contained within the reservoir; and
a preloaded membrane comprising a semipermeable material and a liquid filler material contained within the semipermeable material, wherein the preloaded membrane is configured to allow a fluid to pass from an environment surrounding the reservoir into the osmotic composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An osmotic delivery device comprising:
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a reservoir having at least one drug delivery orifice;
an osmotic composition contained within the reservoir;
a drug formulation contained within the reservoir; and
a preloaded membrane comprising a semipermeable material and a liquid filler material contained within the semipermeable material, wherein the preloaded membrane is configured as a plug that is positioned within an opening in the reservoir, and wherein the liquid filler material comprises at least one of a polyethylene glycol, a propylene glycol, a dimethyl sulfoxide, and an organic liquid.
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16. A method of reducing the delivery start-up time of an osmotic delivery device comprising:
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providing a reservoir having at least one drug delivery orifice;
disposing an osmotic composition within the reservoir;
disposing a drug formulation within the reservoir;
preloading a membrane comprising a semipermeable material with a liquid filler material; and
associating the membrane with the reservoir such that the membrane is configured to allow a fluid to pass from an environment surrounding the reservoir into the osmotic composition. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification