- Subjects should not be using any LHRH agonists (such as leuprolide [Lupron, Eligard], buserelin [Suprefact, Suprecor], nafarelin [Synarel], histrelin [Supprelin], goserelin [Zoladex], deslorelin [Suprelorin, Ovuplant], Triptorelin and others) or antagonists (such as Abarelix [Plenaxis], Cetrorelix [Cetrotide], Ganirelix [Antagon] and others) prior to study treatments. If LHRH agonists are being used, a 4-week washout period is recommended.