- Patients must not be pregnant or nursing, and all patients (both men and women) must be willing to practice birth control during and for 2 months after treatment with CC-8490. Women of childbearing potential (WCBP) who are sexually active must agree to use adequate contraceptive methods (oral, injectable, or implantable hormonal contraceptive; tubal ligation; intra-uterine device; barrier contraceptive with spermicide; or vasectomized partner).