- Any women of childbearing potential who has a positive urine pregnancy test, who is lactating, who is not surgically sterile (by tubal ligation or hysterectomy), who is not at least 2 years postmenopausal, or has not practiced an acceptable form of birth control (defined as the use of an intrauterine device with spermicide, a barrier method with spermicide, condoms with spermicide, subdermal implant, oral contraceptives, or abstinence) for at least 2 months prior to Visit 1.