- Female subjects - not surgically sterile or at least two years postmenopausal - must agree to utilize one of the following forms of contraception, if sexually active with a male partner, at least from screening through completion of the study. Approved forms of contraception are abstinence, hormonal (oral, implant, transdermal or injection) in use at least 3 consecutive months prior to first dose of study medication, double barrier (condom with spermicide and diaphragm with spermicide), intra-uterine device (IUD), or vasectomized partner (6 months minimum since vasectomy).