Finasteride Tablets USP

(Commercial Product)

Available Dosage Strengths

1 mg

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Disclaimer: Images are for reference only; actual products may vary.

Product Overview

Finasteride Tablets USP Description1,2,3

Finasteride, a 5-alpha reductase inhibitor, has been shown to benefit patients with symptomatic benign prostatic hyperplasia. Benign prostatic hyperplasia affects men over the age of 50. Finasteride has also been shown to benefit androgenetic alopecia (male pattern baldness).

Mechanism of Action1,2,3

Finasteride is an analog of testosterone that acts as a competitive, specific inhibitor of type II 5-alpha-reductase, an intracellular enzyme that converts testosterone to the potent androgen 5-alpha-dihydrotestosterone. The type II 5-alpha-reductase isozyme is primarily found in prostate, seminal vesicles, epididymides, and hair follicles, as well as liver. Dihydrotestosterone has been shown to increase prostate growth and can lead to hair thinning. Finasteride has been shown to shrink the prostate to improve urinary flow and in scalp lowers dihydrotestosterone to slow hair loss and promote regrowth.

Adverse Reactions1,2,3

  • Decreased libido
  • Erectile dysfunction
  • Ejaculatory disorders (e.g., reduced volume)
  • Breast tenderness or enlargement
  • Gynecomastia

Contraindications1,2,3

  • Contraindicated in women who are or may become pregnant due to risk of teratogenicity (can cause abnormalities in the external genitalia of male fetuses).
  • Hypersensitivity to finasteride or any component of the tablet.

Precautions1,2,3

  • Finasteride lowers serum PSA levels by ~50% after 6 months, which can mask early detection of prostate cancer.
  • Use cautiously in patients with hepatic dysfunction. The drug is metabolized extensively in the liver.
  • Store at controlled room temperature (20°C to 25°C / 68°F to 77°F)
  • Protect from moisture and light
  • Keep in a tightly closed container
  1. Finasteride (Proscar) package insert www.accessdata.fda.gov/drugsatfda_docs/label/2010/020180s037lbl.pdf
  2. Finasteride (Propecia) www.accessdata.fda.gov/drugsatfda_docs/label/2012/020788s020s021s023lbl.pdf
  3. Clinical Pharmacology finasteride clinical monograph 2025 https://www.clinicalkey.com/pharmacology/

Wells Pharmacy Network distributes certain FDA-approved commercial products that are manufactured by third-party pharmaceutical companies. These products are not compounded or manufactured by Wells Pharmacy Network. Product availability at the time of dispensing may vary due to supply chain conditions.

This information is for educational purposes only. Compounded products have not been reviewed, approved, or evaluated by the FDA for safety and effectiveness. It is not intended to diagnose, treat, cure, or prevent any disease. No claims are made regarding treatment, cure, or prevention of any disease or condition.

A Wells Pharmacy Network pharmacist is available to answer any questions. For consultation, please call 1-800-622-4510.

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