Ion-exchange resins: carrying drug delivery forward

Ion-exchange resins (IER), or ionic polymer networks, have received conside rable attention from pharmaceutical scientists because of their versatile p roperties as drug-delivery vehicles. In the past few years, IER have been e xtensively studied in the development of novel drug-delivery systems (DDSs) and other biomedical applications. Some of the DDSs containing IER have be en introduced into the market. In this review, the applications of IER in d rug delivery research are discussed.