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Pregnancy: Pregnancy Category X. Dutasteride is contraindicated for use in women of childbearing potential and during pregnancy. It is a 5 alpha-reductase inhibitor that prevents conversion of testosterone to dihydrotestosterone (DHT), a hormone necessary for normal development of male genitalia. In animal reproduction and developmental toxicity studies, dutasteride inhibited normal development of external genitalia in male fetuses. Therefore, dutasteride may cause fetal harm when administered to a pregnant woman. If dutasteride is used during pregnancy or if the patient becomes pregnant while taking dutasteride, the patient should be apprised of the potential hazard to the fetus.
Nursing Mothers: Dutasteride is contraindicated for use in women of childbearing potential, including nursing women. It is not known whether dutasteride is excreted in human milk.
