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Pregnancy: PROSCAR is contraindicated for use in women when they are or may potentially be pregnant (See Contraindications).
Because of the ability of Type II 5α-reductase inhibitors to inhibit conversion of testosterone to dihydrotestosterone, these drugs, including finasteride, may cause abnormalities of the external genitalia of a male fetus when administered to a pregnant woman.
Nursing Mothers: PROSCAR is not indicated for use in women.
It is not known whether finasteride is excreted in human milk.
