This book entitled - Formulation variables of Transdermal Drug Delivery
Systems: Gels Contains detailed formulation Study of drug release
behaviour and rheological properties of gels. inclusion of ingredients
such as hydroxy propyl cellulose, carboxy methyl ccellulose, sodium
lauryl sulphate, tween etc plays a important role in drug release and
formulation behaviour. The importance of ingredients can be understand
only after the precise delivery of drug at a determined or predetermined
rate.