Enhanced drug delivery in transdermal systems

Details Enhanced drug delivery in transdermal systems Enhanced drug delivery in transdermal systems

2002-12-30

2008-11-25

Hui, San-ming (Department: 1617)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

Cyclopentanohydrophenanthrene ring system doai

Reexamination Certificate

active

07456159

ABSTRACT:
A composition for transdermal administration resulting from an admixture includes: a therapeutically effective amount of a drug that includes a parent drug and a prodrug; and and a pharmaceutically acceptable carrier, wherein the parent drug and prodrug are individually present in an amount sufficient for a pharmacological effect. In a preferred embodiment, the admixture includes: a therapeutically effective amount of a pharmaceutically active agent that includes a corresponding steroid and a steroid derivative; and a carrier for the pharmaceutically active agent. The steroid and the corresponding steroid derivative are present in a weight ratio of 10:1 to 1:10 steroid: corresponding steroid derivative. In a preferred embodiment ratio is 6:1 to 1:6. In a preferred embodiment, the corresponding steroid derivative is a steroid ester. In another preferred embodiment, the carrier is a polymer that includes a pressure-sensitive adhesive. In another preferred embodiment, the parent drug is an ACE inhibitor such as ramipril and the prodrug is an ACE inhibitor prodrug such as ramipril ethyl and/or methyl ester.

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