Such permeation enhancers can be selected from, but are not limited to, C2-4 alcohols such as ethanol and isopropanol, polyethylene glycol monolaurate, polyethylene glycol-3-lauramide, dimethyl lauramide, lauric diethanolamide, lauryl lactate, esters of fatty acids including sucrose esters such as sucrose monococoate and sucrose monolaurate, monoglycerides or mixtures of monoglycerides of fatty ac