4. Women of childbearing potential who are not abstinent and not practicing a medically acceptable method of contraception. Female patients must practice an acceptable contraceptive technique for 30 days before randomization and agree to continue its use during treatment and for 30 days after the last dose of study drug. Oral, intrauterine, implantable, injectable contraceptives, or a double barrier form of contraception are acceptable and the medication including dose, device or method must have been stable for at least 30 days before the first dose of study drug.