Topical drug release system

Details Topical drug release system Topical drug release system

A - Human Necessities

61

K

167/159

A61K 9/08 (2006.01) A61K 9/06 (2006.01) A61K 31/57 (2006.01)

Patent

CA 1249520

Abstract A pharmaceutical composition for topical administration consisting of two liquid phases designed to be admixed in situ or prior to use. The first phase contains a dissolved drug, and is preferably saturated in the drug, whilst the second phase is a chemically or physically different liquid from that in the first phase and contains no drug, but is miscible with the first phase. The two liquids are selected so that, on admixture of suitable volumes of the phases, the resultant drug concentration exceeds the saturated drug solubility in the resultant mixture. This produces a liquid mixture supersaturated in drug, which has been found to increase the rate of drug penetration into the skin. The two liquid phases may be gels, and the drug may be hydrocortisone.

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