The book "Design and Development of Iontophoretic Drug Delivery System" offers a comprehensive analysis of iontophoresis techniques and their application in drug delivery. It covers the fundamental principles of iontophoresis as well as the various instruments and devices used for medication administration. Additionally, it discusses factors that influence the effectiveness of transdermal systems, including patient conditions and clinical manifestations. The work also provides insights into the selection of suitable medications, the compatibility between drugs and devices, as well as the therapeutic possibilities and limitations of iontophoresis. The authors, Kirubakaran Narayanan and Reeta Vijaya Rani K., have created a valuable resource for professionals and students in the fields of pharmacology and medical technology.