7. Females of child-bearing potential and sexually active with men should agree to continue using a medically acceptable method of birth control throughout the study and for 7 days immediately after the last dose of study drug. Medically acceptable methods of birth control include bilateral tubal ligation or the use of either a contraceptive implant, a contraceptive injection (e.g., Depo Provera™), an intrauterine device, or an oral contraceptive taken continually within the past three months and which the subject agrees to continue using during the study or to adopt another birth control method, or a double-barrier method which consists of a combination of any two of the following: diaphragm, cervical cap, condom, or spermicide.