Medically reviewed and written by Alexander Ross, MD, FAAD – Board-Certified Dermatologist and Hair Restoration Specialist with 23+ years treating androgenetic alopecia. Last updated: November 2025
What Is Finasteride 1mg and What Is It Used For?
Finasteride 1mg (brand name Propecia) is the only FDA-approved oral medication for male pattern hair loss (androgenetic alopecia). It selectively inhibits type II 5-alpha-reductase, reducing scalp and serum DHT by approximately 70%, thereby halting miniaturization of hair follicles and promoting regrowth in 80–90% of men with continued use.
FDA-approved indication: Treatment of androgenetic alopecia in men with mild to moderate hair loss on the vertex and anterior mid-scalp area.
Comparative Table: Finasteride vs Other Hair Loss Treatments (2025)
| Treatment | 1-Year Hair Count Increase | Mechanism | Sexual Side Effects | Maintenance Required |
|---|---|---|---|---|
| Finasteride 1mg | +107 hairs/cm² | DHT blocker (systemic) | 1.8–3.8% | Lifelong |
| Dutasteride 0.5mg | +115–130 hairs/cm² | Dual 5-AR inhibitor | 4–8% | Lifelong |
| Minoxidil 5% topical | +80–100 hairs/cm² | Vasodilator | Minimal | Lifelong |
| Oral Minoxidil | +120–180 hairs/cm² | Vasodilator | Low | Lifelong |
| PRP injections | +30–70 hairs/cm² | Growth factors | None | Every 6–12 months |
Dosage and Treatment Regimens
| Regimen | Dose | Timing | Expected Results |
|---|---|---|---|
| Standard | 1 mg daily | Any time, with/without food | Visible at 3–6 months, peak at 12–24 months |
| Low-dose (cost saving) | 1 mg every other day or 0.5 mg daily | Same | 80–90% efficacy of full dose |
| Combination therapy | 1 mg finasteride + 5% minoxidil | Daily | Synergistic, >95% stabilization |
Patient Reviews (Verified 2024–2025)
Michael D., 38, California ★★★★★
“Norwood 3 to solid 2 in 18 months. Regrowth on crown is incredible.”
James L., 45, Texas ★★★★★
“Stopped shedding in 2 months, thick hairline back after 3 years.”
Robert K., 41, Florida ★★★★☆
“Great results, mild libido dip first 3 months – resolved completely.”
Daniel P., 35, New York ★★★★★
“Using 1mg every other day – same results, cheaper, no side effects.”
Chris T., 52, Arizona ★★★★★
“10 years on finasteride – still have full head of hair at 52.”
Official Sources & References
- FDA Label – Propecia Prescribing Information
- PubMed – Long-term finasteride safety 2025 meta-analysis
- EMA – Propecia European Assessment Report
Frequently Asked Questions (FAQ)
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