- Females with childbearing potential must have had a negative serum pregnancy test less than or equal to 7 days prior to the first dose of study drug. Males and females with reproductive potential must agree to use 2 medically approved contraceptive methods during the trial and for 3 months following the last dose of study drug. Female patients must agree to use 2 medically acceptable methods of contraception, 1 being an oral contraceptive, dermal patch, or progestin (implantation or injection), and the other being a medically acceptable barrier method; alternatively, 2 medically acceptable barrier methods may be used. Medically acceptable barrier methods of contraception that may be used by the participant and/or his/her partner include: abstinence; diaphragm with spermicide; intrauterine device (IUD); condom together with foam, spermicide, or vaginal spermicidal suppository. Prohibited methods include the rhythm method, withdrawal, condoms alone, or diaphragm alone