- Agreement by women of childbearing potential (not surgically sterile or 2 years postmenopausal) to use a medically accepted method of contraception and continue the use of this method for the duration of the study and for 90 days after participation in the study. Acceptable methods of contraception include abstinence, barrier method with spermicide, intrauterine device (IUD), or steroidal contraceptive (oral, transdermal, implanted, and injected) in conjunction with a barrier method.