ABSTRACT The goal of delivery system is to get optimal therapeutic management. But, it still remains a challenge in the field of pharmaceuticals for delivery of ionic species and some non ionic. Several transdermal approaches have been used and recently the Iontophoretic technique has been widely used. This technique of facilitated movement of ion across a membrane under the influence of an externally applied potential difference is one of the most promising physical penetrations enhancing method. The rationale behind using this technique is the capability of this method to increase the systemic delivery of high molecular weight compounds with controlled input kinetics. Also improved systemic bioavailability, ensuring from bypassing the first pass metabolism. This article presents a review of literature relating to iontophoresis. This review briefly describes the history of iontophoresis and discussion of factors which affect Iontophoretic drug delivery. Present review also provides its applications for various clinical conditions
