- Males or females between 18 and 80 years old. Female patients must be surgically sterile, post-menopausal, or using an accepted method of birth control (i.e., oral contraceptives, intrauterine device, Norplant® system, Depo Provera®, or a spermicide and condom). Female patients of childbearing potential must have a negative serum pregnancy test and be advised not to become pregnant during the study.