Controlled release of drugs
First Claim
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1. A drug delivery system comprising:
- (a) a therapeutic amount of a pharmaceutical agent;
(b) a container having (i) at least one aperture and (ii) a wall having an inside and an outside;
(c) an excipient formulation disposed in said container regulating a diffusional boundary for said pharmaceutical agent, wherein the diffusional boundary layer is confined within said container for a period of time to allow drug delivery to a desired location and continuously releasing said pharmaceutical agent upon solvation at a rate of less than one-fifth of the initial release of said pharmaceutical agent in an uncoated form, the excipient formulation comprising a release control agent and an ingredient selected from the group consisting of;
a lubricating agent, a filling agent and a mixture thereof, the ratio of the release control agent to the ingredient ranging from 0.2 to 170; and
(d) a cover layer adhered to the wall, wherein at least one of the container or the cover layer is semi-permeable to said pharmaceutical agent.
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Accused Products
Abstract
A device for controlled release of pharmaceutical agents and a method for use of the device. The drug delivery device comprises a covered container with an aperture and an aperture cover, containing a pharmaceutical agent and an excipient formulation.
71 Citations
43 Claims
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1. A drug delivery system comprising:
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(a) a therapeutic amount of a pharmaceutical agent;
(b) a container having (i) at least one aperture and (ii) a wall having an inside and an outside;
(c) an excipient formulation disposed in said container regulating a diffusional boundary for said pharmaceutical agent, wherein the diffusional boundary layer is confined within said container for a period of time to allow drug delivery to a desired location and continuously releasing said pharmaceutical agent upon solvation at a rate of less than one-fifth of the initial release of said pharmaceutical agent in an uncoated form, the excipient formulation comprising a release control agent and an ingredient selected from the group consisting of;
a lubricating agent, a filling agent and a mixture thereof, the ratio of the release control agent to the ingredient ranging from 0.2 to 170; and
(d) a cover layer adhered to the wall, wherein at least one of the container or the cover layer is semi-permeable to said pharmaceutical agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A process for drug delivery comprising the step of administering to an individual a drug delivery device comprising:
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(a) a therapeutic amount of a pharmaceutical agent;
(b) a container having (i) at least one aperture and (ii) a wall having an inside and an outside;
(c) an excipient formulation disposed in said container regulating a diffusional boundary for said pharmaceutical agent, wherein the diffusional boundary layer is confined within said container for a period of time to allow drug delivery to a desired location and continuously releasing said pharmaceutical agent upon solvation at a rate of less than one-fifth of the initial release of said pharmaceutical agent in an uncoated form, the excipient formulation comprising a release control agent and an ingredient selected from the group consisting of;
a lubricating agent, a filling agent and a mixture thereof, the ratio of the release control agent to the ingredient ranging from 0.2 to 170; and
(d) a cover layer adhered to the wall, wherein at least one of the container or the cover layer is semi-permeable to said pharmaceutical agent. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification