Treatment Deep-Dive

Finasteride for hair loss

Finasteride is the prescription tablet that targets the hormone driving male-pattern loss. Here's the effectiveness data and the side-effect reality.

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How it works

Male-pattern loss traces back to DHT miniaturizing your follicles. Finasteride disables much of the type 2 5-alpha-reductase enzyme that produces DHT, easing the pressure so follicles can recover.

Effectiveness

Research shows finasteride arrests further loss in about 80–90% of men and produces visible regrowth in roughly two-thirds. Earlier is better, and its peak comes alongside minoxidil, where about 94% of men improved over a year.

Tablet or topical

The 1 mg oral tablet is the standard and most-studied form. A topical version targets the scalp with less DHT circulating in the blood, potentially trimming systemic side effects while keeping most of the effect.

Side-effect reality

A minority of men report sexual side effects, usually reversible after stopping. As a hormone-active drug it's prescription-only and unsuitable for women who might become pregnant. Want firmer DHT control? Dutasteride is the stronger option to discuss with a doctor.

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Medical disclaimer: This page is general educational information, not medical advice, diagnosis, or treatment. Success rates are estimates from published sources and vary by individual. Always consult a licensed physician or dermatologist before starting or stopping any treatment.

Frequently asked questions

Does finasteride work for hair loss?

For most men, yes. Finasteride blocks the hormone DHT that shrinks follicles, and studies show it stops loss in the large majority of users and regrows some hair, especially at the crown. It works best started early.

What are the side effects of finasteride?

Most men have none. A small percentage report sexual side effects (reduced libido or function), which usually resolve after stopping. Discuss your history with a doctor before starting.

How long until finasteride works?

Give it time. You may see reduced shedding in 3-4 months, but visible regrowth typically takes 9-12 months. Results are maintained only while you keep taking it.