Does finasteride actually regrow hair?

Yes, for most men. Clinical studies show that 83 to 90% of men who take finasteride 1mg daily either maintain their existing hair or experience visible regrowth over 2 years. About 65% see measurable regrowth (increased hair count), while the remainder see stabilization of their current hair. Results are best when treatment starts early in the hair loss process.

How long until finasteride works?

Most patients begin to see reduced shedding within 3 to 4 months . Visible regrowth typically becomes noticeable at 6 to 12 months , with maximum results appearing at 12 to 24 months of consistent use. Finasteride requires patience, and stopping treatment prematurely is one of the most common reasons patients believe it did not work.

What percentage of men see results from finasteride?

83 to 90% of men see either hair maintenance or regrowth in clinical trials over 2 years. About 65% see visible improvement (new growth), while approximately 20 to 25% maintain existing hair without further loss. Only about 10 to 17% of men experience continued hair loss despite treatment.

What are the sexual side effects of finasteride?

Sexual side effects (decreased libido, erectile difficulty, reduced ejaculate volume) are reported in 2 to 4% of men in clinical trials, compared to 1 to 2% on placebo. For most men who experience them, these side effects resolve after discontinuing the medication or, in some cases, even while continuing treatment. The concept of persistent post-finasteride syndrome remains controversial and is not supported by controlled clinical data.

What happens if I stop taking finasteride?

Hair loss resumes gradually after stopping finasteride. Most patients return to their pre-treatment hair loss pattern within 6 to 12 months of discontinuation. Any regrowth gained while on the medication is typically lost. This is why finasteride is considered a long-term commitment for men who want to maintain results.

Guide

Does Finasteride Really Work? Results, Timeline, and Side Effects

An evidence-based guide to finasteride for hair loss, covering clinical effectiveness, realistic timelines, success rates, and a balanced look at side effects.

Updated April 2026Editorially ReviewedEditorial Independence

How finasteride works for hair loss

Finasteride is a type II 5-alpha reductase inhibitor that blocks the conversion of testosterone to dihydrotestosterone (DHT) in the body. DHT is the primary hormone responsible for male pattern hair loss (androgenetic alopecia). It binds to receptors in hair follicles on the scalp, causing them to shrink over time (a process called miniaturization) until they eventually stop producing visible hair.

By reducing systemic DHT levels by approximately 60 to 70%, finasteride slows and often reverses this miniaturization process. Hair follicles that have not yet been permanently lost can recover, producing thicker, longer hairs. This is why early treatment is more effective: the more follicles that are still alive (even if miniaturized), the more potential for regrowth.

Finasteride has been FDA-approved for male pattern hair loss since 1997 at a dose of 1mg daily. It is one of only two FDA-approved medical treatments for hair loss (the other being minoxidil). Its long track record and extensive clinical data make it the most well-studied hair loss treatment available.

Clinical evidence and success rates

The evidence base for finasteride is extensive. The pivotal clinical trials followed men for up to 5 years and showed consistent results. At 2 years, 83% of men on finasteride maintained or increased their hair count, compared to 28% on placebo. At 5 years, 90% of men on finasteride showed visible improvement compared to their baseline photographs.

Hair count studies (the most objective measure) show an average increase of approximately 100 to 150 hairs per square centimeter in the vertex (crown) area after 2 years of treatment. The frontal scalp also responds, though typically with slightly less dramatic improvement than the crown. The temporal region (receding temples) shows the least response.

Real-world results generally align with clinical trial data, though patient perception can lag behind objective measurements. Many patients feel disappointed at 3 months because they expect dramatic change, when the medication is still in its early phase. Telehealth providers like Hims and Keeps often provide progress photo tracking that helps patients see gradual changes they might otherwise miss.

Realistic timeline: what to expect month by month

Months 1 to 3: Most patients notice reduced shedding. Some experience a temporary increase in shedding (known as 'dread shed') as weakened hairs are pushed out to make room for new growth. This is actually a positive sign but can be alarming if patients are not prepared for it. No visible regrowth should be expected during this phase.

Months 3 to 6: Shedding typically normalizes. Early signs of new growth may appear, usually as fine 'baby hairs' in areas of thinning. Existing hairs may begin to look slightly thicker. This is the phase where many patients become impatient, so setting realistic expectations upfront is important.

Months 6 to 12: Visible improvement becomes apparent for most responders. Hair density increases, thinning areas fill in, and the overall appearance of fullness improves. This is often when patients first feel that the treatment is 'working,' though the biological changes began months earlier.

Months 12 to 24: Maximum results develop. Hair count studies show continued improvement through the second year. After 24 months, the medication primarily maintains the results achieved, with ongoing protection against further DHT-mediated hair loss.

Side effects: a balanced assessment

Finasteride side effects are a common concern and deserve an honest, evidence-based discussion. In controlled clinical trials, the following side effects were reported: decreased libido (1.8% finasteride vs 1.3% placebo), erectile dysfunction (1.3% vs 0.7%), and decreased ejaculate volume (0.8% vs 0.4%). These differences are statistically small but real for the individuals who experience them.

For most men who develop sexual side effects, symptoms resolve either after discontinuation or, in some cases, with continued use as the body adjusts. The concept of 'post-finasteride syndrome' (persistent side effects after stopping) has received media attention but remains controversial in the medical community. No controlled study has confirmed its existence, and the nocebo effect (experiencing side effects because you expect them) is a documented factor in finasteride studies.

The practical advice: discuss the side effect profile honestly with your clinician. If you experience concerning side effects, discontinue the medication and they will almost certainly resolve. Do not avoid an effective treatment based on fear of statistically uncommon side effects, but do stay informed and communicate with your provider. PlushCare offers live video consultations where these concerns can be discussed in detail.

How to get finasteride through telehealth

Finasteride is available through multiple telehealth platforms, making it more accessible than ever. Most platforms use an asynchronous questionnaire and photo review process, though some offer live video consultations. Pricing typically ranges from $24 to $35 per month through subscription services, with generic finasteride being the most cost-effective option.

Hims offers finasteride starting at $26/mo with optional combination products and a streamlined digital experience. Keeps offers one of the lowest prices at $24/mo with optional dermatologist consultations. PlushCare provides live physician consultations and can work with your insurance for the visit, making it a good choice for patients who want a more traditional clinical interaction.

This guide is educational and not a substitute for personal medical advice. Eligibility, contraindications, and monitoring needs differ across individuals, which is why treatment decisions should be reviewed with a licensed clinician.