Finasteride before and after: Realistic results and timelines

DoktorABC editorial team

Accurate, up-to-date health information written by our editorial team and reviewed by UK-registered prescribers.

Does finasteride stop hair loss or regrow hair?

Finasteride primarily stabilises hair loss. Regrowth is possible but secondary, and its extent varies considerably between individuals.

Finasteride works by inhibiting 5-alpha reductase, reducing dihydrotestosterone (DHT) levels by approximately 70% at the 1 mg dose. DHT is the hormone responsible for miniaturising hair follicles in men with androgenetic alopecia. By reducing DHT, finasteride slows or halts follicle miniaturisation. In follicles that have not yet been permanently lost, some reversal of miniaturisation and visible regrowth is possible. See our guide for a full explanation on how finasteride works.

The most reliable outcome to expect is stabilisation. Regrowth, where it occurs, is a bonus.

Finasteride results timeline

What should you expect at 3 months?

At three months, most men see little visible improvement and some experience increased shedding. This is a normal and recognised response: as DHT levels fall, some hairs in the telogen (resting) phase shed simultaneously before new growth begins. This is not a sign that finasteride is not working.

What should you expect at 6 months?

By six months, shedding typically stabilises and early signs of density improvement become apparent in men who are responding to treatment. Clinical trial data from the pivotal 1 mg finasteride trials showed statistically significant improvements in hair count and patient-assessed hair growth by month six compared to placebo.

What do 1-year results look like?

Twelve months is the most clinically meaningful assessment point. In the landmark study of finasteride 1 mg in men with androgenetic alopecia, 86% of men on finasteride maintained or increased hair count after one year, compared to 42% on placebo. Visible regrowth was reported in approximately 48% of finasteride users.

The finasteride Summary of Product Characteristics at medicines.org.uk states that in clinical trials at two years, men on finasteride showed a mean increase in hair count of 107 hairs in a defined scalp area, compared to a decrease of 150 hairs in the placebo group.

What do results look like after 2 years?

Results continue to improve through the second year of treatment before plateauing. The two-year mark represents the approximate peak of finasteride's benefit. Continued treatment is required to maintain results; hair loss resumes after stopping.

In long-term extension studies, men who continued finasteride for five years maintained their gains, while those who stopped experienced progressive hair loss resuming within twelve months.

What about hairline results?

Frontal hairline recession is the least responsive area to finasteride. This is because the frontal scalp follicles are more sensitive to DHT and more likely to have undergone advanced miniaturisation by the time treatment begins. Finasteride's strongest evidence of efficacy is for the vertex (crown) and mid-scalp regions.

Men whose primary concern is frontal recession should have realistic expectations: stabilisation is more likely than meaningful regrowth at the hairline, particularly if recession is already established.

Topical finasteride before and after: How does it compare?

Topical finasteride, applied directly to the scalp, reduces local DHT while producing lower systemic DHT suppression than oral tablets. Early studies suggest comparable scalp efficacy to oral finasteride in terms of hair density outcomes, with the potential advantage of reduced systemic side effects. 

However, the evidence base for topical finasteride is less mature than for oral finasteride. Long-term controlled trial data is limited, and topical formulations are not currently MHRA-licensed as standalone products in the UK. Results from topical formulations should be considered promising but not yet as robustly evidenced as the oral route.

Finasteride and minoxidil combined: What do results look like?

Combining finasteride with minoxidil produces superior outcomes to either treatment alone. A randomised controlled trial found that the combination produced significantly greater improvements in hair count and patient satisfaction scores than finasteride or minoxidil used in isolation.

The mechanism is complementary: finasteride reduces DHT-driven miniaturisation while minoxidil stimulates the anagen (growth) phase of the hair cycle. For men seeking maximum results, combination treatment is the most evidence-supported approach and is reflected in clinical guidelines.

What factors influence your results?

• Norwood scale stage at treatment start: Men at earlier stages (I–III) typically respond better than those at advanced stages (V–VII), where more follicles have been permanently lost
• Age: Younger men starting treatment earlier in the hair loss process tend to see better outcomes
• Consistency: Missing doses disrupts DHT suppression. Consistent daily use is essential for optimal results
• Individual DHT sensitivity: Genetic variation in androgen receptor sensitivity means some men respond more dramatically than others to the same DHT reduction

What happens when you stop finasteride?

Hair loss resumes after stopping finasteride, typically within six to twelve months. DHT levels return to baseline within two weeks of discontinuation, and follicle miniaturisation resumes at its pre-treatment rate. Most of the hair gained or maintained during treatment is lost within one to two years of stopping.

Final thoughts

Finasteride's primary value is in stopping or significantly slowing hair loss progression. Regrowth, where it occurs, is meaningful but variable. The most important predictor of a good outcome is starting treatment early and maintaining it consistently. Results should be assessed at twelve months, and treatment continued long-term to maintain benefit.

DoktorABC connects UK patients with licensed prescribers who can assess suitability for finasteride and provide ongoing clinical guidance.

FAQ

The DoktorABC medical advisory board

Dr. Roland Ruiken

Medical advisor, Norway

Dr. Viktor Simunovic

Medical advisor, Croatia

To the medical advisory board