# Finasteride

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DRUG INFORMATION

  ADULT
    - Finasteride may be administered with or without meals ( ). 2 Monotherapy: One
      tablet (5 mg) taken once a day ( ). 2.1 Combination with Doxazosin: One tablet (5
      mg) taken once a day in combination with the alpha-blocker doxazosin ( ). 2.2 2.1
      Monotherapy The recommended dose of finasteride tablets USP, 5 mg is one tablet (5
      mg) taken once a day .
      Source: US FDA label for finasteride (Finasteride), section 'dosage and
      administration', retrieved 2026-08-29
    - Finasteride tablets USP, 5 mg may be administered with or without meals.
      Finasteride may be administered with or without meals ( ). 2 Monotherapy: One
      tablet (5 mg) taken once a day ( ). 2.1 Combination with Doxazosin: One tablet (5
      mg) taken once a day in combination with the alpha-blocker doxazosin ( ). 2.2 2.1
      Monotherapy The recommended dose of finasteride tablets USP, 5 mg is one tablet (5
      mg) taken once a day .
      Source: US FDA label for finasteride (Finasteride), section 'dosage and
      administration', retrieved 2026-08-29

  CHILD
    - Finasteride is not indicated for use in pediatric patients. Safety and
      effectiveness in pediatric patients have not been established.
      Source: US FDA label for finasteride (Finasteride), section 'pediatric use',
      retrieved 2026-08-29

  RENAL IMPAIRMENT
    - No dosage adjustment is necessary in the elderly . [see and ] Clinical
      Pharmacology (12.3) Clinical Studies (14) 8.6 Hepatic Impairment Caution should be
      exercised in the administration of finasteride in those patients with liver
      function abnormalities, as finasteride is metabolized extensively in the liver .
      [see ] Clinical Pharmacology (12.3) 8.7 Renal Impairment No dosage adjustment is
      necessary in patients with renal impairment .
      Source: US FDA label for finasteride (Finasteride), section 'use in specific
      populations', retrieved 2026-08-29

  HEPATIC IMPAIRMENT
    - No dosage adjustment is necessary in the elderly . [see and ] Clinical
      Pharmacology (12.3) Clinical Studies (14) 8.6 Hepatic Impairment Caution should be
      exercised in the administration of finasteride in those patients with liver
      function abnormalities, as finasteride is metabolized extensively in the liver .
      [see ] Clinical Pharmacology (12.3) 8.7 Renal Impairment No dosage adjustment is
      necessary in patients with renal impairment .
      Source: US FDA label for finasteride (Finasteride), section 'use in specific
      populations', retrieved 2026-08-29

  PREGNANCY
    - Pregnancy Category X. [See .] Contraindications (4) Finasteride is contraindicated
      for use in women who are or may become pregnant.
      Source: US FDA label for finasteride (Finasteride), section 'pregnancy', retrieved
      2026-08-29
    - Finasteride is a Type II 5α-reductase inhibitor that prevents conversion of
      testosterone to 5α-dihydrotestosterone (DHT), a hormone necessary for normal
      development of male genitalia.
      Source: US FDA label for finasteride (Finasteride), section 'pregnancy', retrieved
      2026-08-29
    - In animal studies, finasteride caused abnormal development of external genitalia
      in male fetuses.
      Source: US FDA label for finasteride (Finasteride), section 'pregnancy', retrieved
      2026-08-29

  BREASTFEEDING
    - Finasteride is not indicated for use in women.
      Source: US FDA label for finasteride (Finasteride), section 'nursing mothers',
      retrieved 2026-08-29
    - It is not known whether finasteride is excreted in human milk.
      Source: US FDA label for finasteride (Finasteride), section 'nursing mothers',
      retrieved 2026-08-29
    - Slightly decreased fertility was observed in male offspring after administration
      of about 3 times the MRHD (based on AUC at animal dose of 3 mg/kg/day) to female
      rats during late gestation and lactation.
      Source: US FDA label for finasteride (Finasteride), section 'use in specific
      populations', retrieved 2026-08-29
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