- Women of child-bearing potential and men must agree to use adequate contraception (hormonal or barrier method of birth control) prior to study entry and for the duration of study participation; men and women of childbearing potential must be willing to consent to using effective contraception while on treatment and for at least 3 months thereafter; women of childbearing potential must have a negative pregnancy test; should a woman become pregnant or suspect she is pregnant while participating in this study, she should inform her treating physician immediately