Hair Loss Research

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PROPECIA® (finasteride) 1mg This site is intended only for healthcare professionals of the United States,
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5-Year Data
See the results of the longest reported controlled clinical study of male pattern hair loss.
View study results.

5-Year Study Highlights

Clinical Hair Count Results
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Investigator Assessment

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PROPECIA


Important Information About PROPECIA

  • PROPECIA is not indicated in women or children.
  • Women should not handle crushed or broken PROPECIA tablets when they are pregnant or may potentially be pregnant because of the possibility of absorption of finasteride and the subsequent potential risk to a male fetus. PROPECIA tablets are coated and will prevent contact with the active ingredient during normal handling, provided that the tablets have not been broken or crushed.
  • Caution should be used in patients with liver function abnormalities, as finasteride is metabolized extensively in the liver.
  • Physicians should instruct their patients to promptly report any changes in their breasts such as lumps, pain, or nipple discharge. Breast changes including breast enlargement, tenderness, and neoplasm have been reported.
  • In clinical studies with finasteride 1 mg in men aged 18 to 41, the mean value of serum prostate-specific antigen (PSA) decreased from 0.7 ng/mL at baseline to 0.5 ng/mL at Month 12. In clinical studies with PROSCAR® (finasteride 5 mg)* when used in older men who have benign prostatic hyperplasia (BPH), PSA levels are decreased by approximately 50%. These findings should be taken into account for proper interpretation of serum PSA when evaluating men treated with finasteride.
  • In clinical studies of 1 year for PROPECIA, each drug-related sexual adverse event occurred in less than 2% of men. Discontinuation due to drug-related sexual adverse experiences was 1.2% in the group treated with PROPECIA and 0.9% in the placebo-treated group. Reported drug-related sexual adverse experiences included decreased libido (1.8% vs 1.3%, placebo), erectile dysfunction (1.3% vs 0.7%, placebo), and ejaculation disorders (1.2% vs 0.7%, placebo), primarily decreased volume of ejaculate (0.8% vs 0.4%, placebo). Resolution occurred in the 1-year studies in men who discontinued therapy with PROPECIA due to these sexual side effects. The incidence of each of the above side effects decreased to <0.3% by the fifth year of treatment with PROPECIA.
  • In postmarketing experience, the following adverse events have been reported: breast tenderness and enlargement; hypersensitivity reactions including rash, pruritus, urticaria, and swelling of the lips and face; and testicular pain.
  • If PROPECIA has not maintained hair count or regrown visible hair within 12 months, further treatment is unlikely to be of benefit. Withdrawal of treatment leads to reversal of effect within 12 months.
  • No dosage adjustment is necessary in the elderly or in patients with renal insufficiency.

    * PROSCAR is a registered trademark of Merck & Co., Inc.

PROPECIA is a registered trademark of Merck & Co., Inc.
20550391(1)-05/05-PRP