- Patients will most likely have had their ovaries removed at the time off initial surgery. If any subjects are of childbearing potential at the time of entry, they must have negative pregnancy test within 7 days before initiation of study drug dosing. Postmenopausal women must be amenorrheic for at least 12 months to be considered of non-childbearing potential. Subjects of reproductive potential must agree to employ and effective barrier method of birth control throughout the study and for up to 3 months following discontinuation of the study drug.