Dr. Rouslan I. Moustafine is an Associate Professor of Pharmacy at the Kazan State Medical University (KSMU) Tatarstan in the Russian Federation. His area of specialization is the development of interpolyelectrolyte complexes (IPECs) with Eudragits® and other pharmaceutical polymers and their application in the design of novel oral drug delivery systems. He has made an important contribution in the field of drug delivery, in particular, with his achievements in the development and characterization of IPECs. In fact, he has been a pioneer in the research of polycomplexes formed by oppositely-charged Eudragit® copolymers, and his work has influenced the current research of many other researchers. He has published over 60 peer-reviewed journal articles, reviews, and two book chapters in the field of the dissolution testing of oral drug delivery systems. He has co-supervised seven PhD students as well as invented five RU Patents. Dr. Moustafine is the Director of Research and Development and cofounder of InterLEK LLC, a pharmaceutical company, focusing their activities in the design of innovative dosage forms. He has reviewed papers for more than 55 international peer-reviewed journals and also serves on the editorial advisory boards of Drug Development and Industrial Pharmacy, Pharmaceutical Development and Technology, Drug Delivery Letters, Recent Patents on Drug Delivery & Formulations, Scientia Pharmaceutica, the Pharmaceutical Chemistry Journal, and some others.