- Both males and females are eligible. Sexually active females, unless surgically sterile (or at least one year post-menopausal), must have used an effective method of avoiding pregnancy (including oral or implanted contraceptives, IUD, female condom, diaphragm with spermicide, cervical cap, abstinence, use of a condom by the sexual partner or sterile sexual partner) for 30 days prior to the first dose of study drug, and must agree to continue using such precautions for 30 days after the final dose of study drug. Sexually active females of reproductive potential must have a negative serum b human chorionic gonadotropin (bhCG) pregnancy test within 3 days of start of therapy.