- A female who is a non-childbearing potentiator or if in child-bearing potential, has a negative serum pregnancy test at screen and agrees to one of the following: complete abstinence from intercourse from 2 weeks prior to administration of the study drug, throughout the study, and for at least 2 weeks after completion or premature discontinuation from the study to account for elimination of the investigational drug. Should a patient decide to become sexually active during the course of the study, she must be counseled and be willing to use one of the birth control methods like double barrier method, intrauterine device, sterilization and any other methods.