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

Description

Finasteride Tablets USP Description^1,2,3

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 Action

Mechanism of Action^1,2,3

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 Reactions

Adverse Reactions^1,2,3

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

Contraindications & Precautions

Contraindications^1,2,3

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.

Precautions^1,2,3

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.

Storage

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

References

Finasteride (Proscar) package insert www.accessdata.fda.gov/drugsatfda_docs/label/2010/020180s037lbl.pdf
Finasteride (Propecia) www.accessdata.fda.gov/drugsatfda_docs/label/2012/020788s020s021s023lbl.pdf
Clinical Pharmacology finasteride clinical monograph 2025 https://www.clinicalkey.com/pharmacology/

Disclaimer

Wells Pharmacy Network is a 503B-registered outsourcing facility that compounds sterile medications in accordance with current good manufacturing practices (cGMP). Certain FDA-approved products referenced on this site are distributed separately from compounded preparations and are not manufactured by Wells Pharmacy Network. Actual products in stock at time of dispensing may vary due to supply chain variability.

This information may not cover all possible drug information about this product. Call your doctor for medical advice and/or about side effects. You may report side effects to the FDA at 1-800-FDA-1088. A Wells Pharmacy Network pharmacist will be happy to answer any questions. For consultation, please call 1-800-622-4510.