The method of adjusting the saturation concentration of a drug in a transdermal composition for application to the dermis, which comprises mixing polymers having differing solubility parameters, so as to modulate the delivery of the drug. This results in the ability to achieve a predetermined permeation...http://www.google.com/patents/US5958446?utm_source=gb-gplus-sharePatent US5958446 - Solubility parameter based drug delivery system and method for altering drug saturation concentration
