Transdermal administration of tamsulosin
First Claim
1. A composition for making a patch for the transdermal delivery of tamsulosin, the composition comprising (a) at least 1 wt % tamsulosin or a pharmaceutically acceptable salt of tamsulosin, (b) at least 40 wt % polyisobutylene adhesive or hydrophobic synthetic rubber adhesive, (c) about 1-20 wt % of an aprotic solvent in which tamsulosin dissolves, (d) about 1-20 wt % of an unsaturated fatty acid or an alpha-hydroxy acid or a mixture of unsaturated fatty acids or alpha-hydroxy acids or of both unsaturated fatty acids and alpha-hydroxy acids, (e) a lipophilic permeation enhancer, and (f) a matrix modifier.
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Accused Products
Abstract
In an aspect of the invention, a composition for making a patch for the transdermal delivery of tamsulosin is provided. The composition comprises (a) at least about 1 wt % tamsulosin or a pharmaceutically acceptable salt of tamsulosin, (b) at least about 40 wt % polyisobutylene adhesive or hydrophobic synthetic rubber adhesive, (c) about 1-20 wt % of an aprotic solvent in which tamsulosin dissolves readily, (d) about 1-20 wt % of an unsaturated fatty acid or an alpha-hydroxy acid or a mixture of unsaturated fatty acids or alpha-hydroxy acids or of both unsaturated fatty acids and alpha-hydroxy acids, (e) a lipophilic permeation enhancer, and (f) a matrix modifier.
323 Citations
40 Claims
- 1. A composition for making a patch for the transdermal delivery of tamsulosin, the composition comprising (a) at least 1 wt % tamsulosin or a pharmaceutically acceptable salt of tamsulosin, (b) at least 40 wt % polyisobutylene adhesive or hydrophobic synthetic rubber adhesive, (c) about 1-20 wt % of an aprotic solvent in which tamsulosin dissolves, (d) about 1-20 wt % of an unsaturated fatty acid or an alpha-hydroxy acid or a mixture of unsaturated fatty acids or alpha-hydroxy acids or of both unsaturated fatty acids and alpha-hydroxy acids, (e) a lipophilic permeation enhancer, and (f) a matrix modifier.
- 29. A method of manufacturing a transdermal drug-in-adhesive patch for delivery of tamsulosin, comprising the steps of (a) dissolving tamsulosin or a pharmaceutically acceptable salt of tamsulosin in an aprotic solvent, (b) combining the tamsulosin solution with a lipophilic permeation enhancer, an optional organic solvent, and an unsaturated fatty acid, (c) adding to the result of (b) a matrix modifier and homogenizing the resulting solution, (d) mixing the result of (c) with a polyisobutylene adhesive or hydrophobic synthetic rubber adhesive in a suitable solvent.
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36. A composition for making a patch for the transdermal delivery of an active agent which has poor solubility in an adhesive matrix, the composition comprising (a) at least 1 wt % the active agent or a pharmaceutically acceptable salt of the active agent, (b) at least 40 wt % polyisobutylene adhesive or hydrophobic synthetic rubber adhesive, (c) about 1-20 wt % of an aprotic solvent in which the active agent dissolves readily, (d) about 1-20 wt % of an unsaturated fatty acid or an alpha-hydroxy acid a mixture of unsaturated fatty acids or alpha-hydroxy acids or of both unsaturated fatty acids and alpha-hydroxy acids, (e) a lipophilic permeation enhancer, and (f) a matrix modifier.
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37. A transdermal delivery system comprising tamsulosin or a pharmaceutically acceptable salt thereof and an alpha-hydroxy acid, wherein the molar ratio of alpha-hydroxy acid to tamsulosin is at least 0.05:
- 1.
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38. A transdermal delivery system comprising tamsulosin or a pharmaceutically acceptable salt thereof and DMSO, wherein the ratio of the cumulative delivery of tamsulosin to cumulative delivery of DMSO is
at least 0.05 during the period from 72 to 120 hours, and at least 0.08 during the period from 120 to 168 hours.
Specification