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Abstract

Due to the recent advances in this technology and as the incorporation of the drug to the site of action is done without rupturing the skin membrane, the transdermal route is becoming very widely accepted route of drug administration. When transdermal formulations are applied to the intact skin , they deliver the drug through the skin at a controlled rate to the systemic circulation. Any formulation like ointments , creams , gels can be used as transdermal formulations for a particular drug, after careful selection of the base and addition of the penetration enhancers . Transdermal patches are the best available TDDS systems which are applied on the surface of the skin to deliver a specific dose of medication through the skin to the blood stream, thus this review mostly revolves around TDDS patches. Various other methods used for drug transport to the blood through skin are Intophoresis, Electroporation, Ultrasound, Reverse electrporation, Photochemical wave etc which also come under TDDS. This review is an attempt to compile the relevant information and techniques under Transdermal Drug Delivery Systems (TDDS) along with the evaluation (in vitro and in vivo) of these. This review also includes recent advances in the field of TDDS. Authors have also made a comment on the limitations of TDDS, comparision of topical and TDDS and toxicity considerations of topical preparations.

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	JPR Solutions

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