A dosage form that coadministers a drug and two percutaneous absorption enhancers to a defined area of the skin is described. The dosage form comprises a body that contains supplies of drug and enhancers and has a basal surface that contacts the area of skin and transmits the drug and enhancers to the...http://www.google.com.au/patents/US4820720?utm_source=gb-gplus-sharePatent US4820720 - Transdermal drug composition with dual permeation enhancers
