Long-term delivery device with early startup
First Claim
1. An improved delivery device for delivering a beneficial agent to an environment of use over a prolonged period of time of 23 days or longer, the delivery device comprising:
- i) a wall that surrounds an internal compartment;
ii) a beneficial agent formulation in the compartment;
iii) an expandable fluid-activated driving member in the compartment, andiv) exit means in the wall;
wherein the improvement comprises a prehydration permeant in the delivery device in contact with the expandable driving member, the prehydration permeant being in an amount of from about 0.025 g to 10 g, the amount being greater than 1% of the weight of the expandable driving member, the prehydration permeant being selected from the group consisting of water, distilled water, purified water, a biologically acceptable fluid and a buffer.
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Abstract
The present invention is directed to an improvement in a delivery device, the device comprising a wall that surrounds an internal lumen or compartment which contains a beneficial agent or medicament formulation, an expandable driving member and an optional density member, and having an a exit means, and wherein the improvement comprises prehydrating the delivery device as a means for advancing the beginning or startup of agent delivery from the delivery system to give earlier release of beneficial agent to the environment of use. An embodiment of the invention concerns a fluid reservoir in contact with the expandable driving member to provide prehydration of the device.
34 Citations
31 Claims
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1. An improved delivery device for delivering a beneficial agent to an environment of use over a prolonged period of time of 23 days or longer, the delivery device comprising:
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i) a wall that surrounds an internal compartment; ii) a beneficial agent formulation in the compartment; iii) an expandable fluid-activated driving member in the compartment, and iv) exit means in the wall;
wherein the improvement comprises a prehydration permeant in the delivery device in contact with the expandable driving member, the prehydration permeant being in an amount of from about 0.025 g to 10 g, the amount being greater than 1% of the weight of the expandable driving member, the prehydration permeant being selected from the group consisting of water, distilled water, purified water, a biologically acceptable fluid and a buffer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An improved delivery device for delivering a beneficial agent to an environment of use over a prolonged period of time of 23 days or longer, the delivery device comprising:
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i) a wall that surrounds an internal compartment, ii) a beneficial agent formulation in the compartment, iii) an expandable fluid-activated driving member in the compartment, and iv) exit means in the wall; wherein the improvement comprises a permeant reservoir containing a prehydration permeant in the compartment, the prehydration being in an amount of from about 0.25 g to 10 g, the amount being greater than 1% of the weight of the expandable driving member, the prehydration permeant being selected from the group consisting of water, distilled water, purified water, a biologically acceptable fluid and a buffer. - View Dependent Claims (16, 17, 18, 19)
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20. A process for shortening the time to startup of release of a beneficial agent from a long-term delivery device into an environment of use, the delivery device comprising:
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i) a wall that surrounds an internal compartment, ii) a beneficial agent formulation in the compartment, iii) an expandable fluid-activated driving member in the compartment, and iv) exit means in the wall; wherein the process comprises the step of prehydrating the device with a prehydration permeant, where the amount of prehydration permeant is from about 0.025 g to 10 g, the amount being greater than 1% of the weight of the expandable driving member, for providing early beneficial agent release from the device, the prehydration permeant being selected from the group consisting of water, distilled water, purified water, a biologically acceptable fluid and a buffer. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification