The skin offers an accessible and convenient site for the administration of\nmedications. To this end, the field of transdermal drug delivery, aimed at developing safe\nand efficacious means of delivering medications across the skin, has in the past and continues\nto garner much time and investment with the continuous advancement of new and innovative\napproaches. This review details the progress and current status of the transdermal drug\ndelivery field and describes numerous pharmaceutical developments which have been\nemployed to overcome limitations associated with skin delivery systems. Advantages and\ndisadvantages of the various approaches are detailed, commercially marketed products are\nhighlighted and particular attention is paid to the emerging field of microneedle technologies.
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