- Male subjects must or be: 1) surgically sterilized for at least 6 months, or 2) use an appropriate method of barrier contraception (e.g., condoms with spermicide) and advise any sexual partner of child-bearing potential that she must also use a reliable method of contraception (e.g., hormonal contraceptive, intrauterine device, diaphragm with spermicide) during the study and for 30 days from study drug administration.