A Review on Transdermal Drug Delivery System

Nowadays about 74% of drugs are taken orally and found not to be as effective required. To improve such characters transdermal drug delivery system was emerged. Drug through the skin attain a systemic effect is commonly known differs from traditional topical delivery. Transdermal systems (TDDS) dosage forms involves transport viable epidermal or dermal tissues for local therapeutic while very major fraction transported into blood circulation. The adhesive critical safety, efficacy quality product. Topical administration agents offers many advantages over conventional oral invasive methods Several important limitation hepatic first pass metabolism, enhancement efficiency maintenance steady plasma level drug. This review article provides an overview disadvantages, factors affecting delivery, components types preparation evaluation.