- Sexually active females of childbearing potential must agree to use adequate contraception (diaphragm, birth control pills, injections, intrauterine device [IUD], surgical sterilization, subcutaneous implants, or abstinence, etc.) for the duration of treatment and for 6 months after the last dose of study therapy. Sexually active men must agree to use barrier contraceptive for the duration of treatment and for 6 months after the last dose of study therapy.