Asoprisnil (INN; developmental code name J-867) is a synthetic, steroidal selective progesterone receptor modulator that was under development by Schering and TAP Pharmaceutical Products for the treatment of uterine fibroids. In 2005, phase III clinical trials were discontinued due to endometrial changes in patients. Asoprisnil (INN; developmental code name J-867) is a synthetic, steroidal selective progesterone receptor modulator that was under development by Schering and TAP Pharmaceutical Products for the treatment of uterine fibroids. In 2005, phase III clinical trials were discontinued due to endometrial changes in patients.