- Men, ages 20 to 45, and men and women [not of childbearing potential (i.e., who are postmenopausal or surgically sterile)], ages 65 or older. Women are considered surgically sterile only if they have undergone a hysterectomy, bilateral tubal ligation, or bilateral oophorectomy. Women are considered postmenopausal only if they have had amenorrhea for ≥12 consecutive months, or for women on hormone replacement therapy (HRT), if they have a documented serum follicle stimulating hormone (FSH) level > 35 mIU/mL