TRANSDERMAL PATCHES: A REVIEW
About Authors:
Patel Chirag J1*, Satyanand Tyagi2, Patel Jaimin1
1Maharishi Arvind Institute of Pharmacy, Department of Pharmaceutics, Jaipur, Rajasthan.
2President, Tyagi Pharmacy Association & Scientific Writer (Pharmacy), Chattarpur, New Delhi, India.
*chirag.bangalore@gmail.com, +918000501871
ABSTRACT:
Now a day about 74% of drugs are taken orally and are found not to be as effective as desired either due to bioavailability problems or degradation of drug in acidic pH of stomach. To resolve such problems, transdermal drug delivery system (TDDS) was emerged. Transdermal drug delivery systems are dosage forms involves drug transport to viable epidermal and dermal tissues of the skin for local therapeutic effect while a very major fraction of drug is transported into the systemic blood circulation. Transdermal drug delivery systems, also known as ‘‘patches,’’ are dosage forms designed to deliver a therapeutically effective amount of drug across a patient’s skin. This review article provides an overview of TDDS, advantages, limitations, various components of TDDS, methods of preparation, types of transdermal patches, factors affecting transdermal permeation, evaluation parameters and new approaches in TDDS.