Disclosed is a vaginal ring intended for the release of at least one drug over a prolonged time period. The vaginal ring contains a ring body made of a first polymeric material having at least one hollow internal channel defining an opening to the exterior of said body and which channel is adapted to...http://www.google.fr/patents/US6126958?utm_source=gb-gplus-shareBrevet US6126958 - Intravaginal rings with insertable drug-containing core
Intravaginal rings with insertable drug-containing core
