- Or, if of childbearing potential, Agree not to try to become pregnant during the study and for 60 days after the final study drug administration; must have a negative urine pregnancy test at screening and day 1, And, if heterosexually active, agree to consistently use 2 forms of highly effective birth control† (at least 1 of which must be a barrier method) starting at screening and throughout the study period and for 60 days after the final study drug administration.