Finasteride is an FDA-approved pharmacologic agent for treating benign prostate hyperplasia and androgenic alopecia (male pattern hair loss) in men. Finasteride has also been used to treat signs of hyperandrogenism, such as hirsutism, and may be used in transgender women in combination with estrogen for its anti-androgen properties. This activity outlines the indications, mechanism of action, dosing, significant adverse effects, contraindications, monitoring, and toxicity of finasteride so that providers can direct patient therapy to optimal outcomes.
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