- Tamibarotene, as with all retinoids, is teratogenic. Therefore, female subjects of childbearing potential must agree to use 2 effective methods of contraception (hormonal, barrier method of birth control, or abstinence) and sexually-active male subjects must agree to use an effective method of contraception (hormonal or barrier method of birth control or abstinence) while participating in this study and for six months afterwards. Women of childbearing potential must have a negative pregnancy test ≤1 week prior to registration.