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Everything You Need To Know About Finasteride
May 21, 2026

Everything You Need To Know About Finasteride

Learn how finasteride helps treat hair loss, what results to expect, side effects, and treatment options.

Hair loss is a concern for many men, with male pattern hair loss and androgenetic alopecia being the most common causes. If you’re one of the millions affected, you’ve likely come across finasteride as a treatment option. This widely prescribed medication offers hope for those looking to slow hair loss and even promote regrowth. But what exactly is finasteride, how does it work, and what should you know before starting treatment? Here’s your comprehensive guide.

What is Finasteride?

Finasteride is a prescription medication designed to treat male pattern hair loss, a condition caused by the hormone dihydrotestosterone (DHT). As a 5-alpha reductase inhibitor, finasteride works by blocking the enzyme that converts testosterone into DHT. By reducing DHT levels, the drug helps protect hair follicles from shrinking and promotes a healthier hair growth cycle.

Originally developed to treat benign prostatic hyperplasia (an enlarged prostate), finasteride was later approved for treating hair loss under the 1 mg/day dosage. This version is commonly known by brand names such as Propecia®, but the generic version contains the same active ingredients and delivers identical results.

How Does Finasteride Work?

To understand how finasteride combats hair loss, it’s helpful to grasp the basics of the hair growth cycle:

  1. Anagen (growth phase): Hair actively grows as follicles produce new strands. This phase can last several years.
  2. Catagen (transition phase): Hair growth slows, and follicles shrink slightly.
  3. Telogen (resting phase): Hair stops growing and eventually sheds, making room for new growth.
  4. Exogen (shedding phase): Old hairs are released from the scalp, and new hairs begin to form.

Male pattern hair loss occurs when DHT binds to hair follicles, causing them to shrink. Over time, this leads to thinner, weaker hair and eventually halts regrowth altogether. Finasteride reduces DHT levels, allowing follicles to produce healthier, thicker hair.

What Can You Expect From finasteride?

Clinical studies have demonstrated that finasteride is effective in slowing hair loss and promoting regrowth. In a two-year study, 83% of men who took finasteride experienced no further hair loss, while 66% saw visible hair regrowth. In contrast, only 7% of those taking a placebo reported hair regrowth.

Timeline for Results

  • 1–2 months: You may notice an initial increase in shedding. This is normal and temporary as weaker hairs are replaced with stronger ones.
  • 3–6 months: Hair loss should slow significantly, and early signs of regrowth may appear.
  • 6–12 months: Hair becomes noticeably thicker, and scalp coverage improves. Continued use is essential to maintain these results.

Stopping finasteride will reverse its effects within a year, as DHT levels return to normal. To sustain benefits, daily use is crucial.

Is Finasteride Safe?

Finasteride is generally well-tolerated, with mild side effects reported in a small percentage of users. These may include:

  • Decreased libido
  • Erectile dysfunction
  • Mood changes, including depression

These effects are rare, affecting less than 4% of users, and often resolve with continued use or after discontinuation. If you experience severe symptoms, such as allergic reactions or breast tenderness, consult a healthcare professional.

Who Should Avoid Finasteride?

  • Pregnant women: Exposure to finasteride can harm male fetuses. Women should avoid handling crushed tablets.
  • Men planning to conceive: Although rare, some research suggests finasteride could affect sperm quality. Discuss this with your doctor if you’re planning a family.

How Does Finasteride Compare to Other Treatments?

The primary alternative to finasteride is minoxidil, a topical solution or foam that stimulates hair growth by increasing blood flow to the scalp. While both treatments are effective, finasteride addresses the hormonal root cause of male pattern hair loss, making it a preferred option for many. Some men choose to use both treatments together for maximum results.

How to Get Started With Finasteride

Finasteride is a prescription medication, so you’ll need to consult a doctor or pharmacist to ensure it’s right for you. Our online services and pharmacy now offer convenient options for obtaining finasteride after a consultation with a licensed clinician. Simply follow the steps on our website, schedule a consultation, and if you’re a candidate for treatment, receive your medication through your letterbox.

With the right approach, finasteride could help you take control of your hair loss and regain confidence.

Why Healir

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Healir combines clinician review, ongoing support, and carefully selected treatments in one simple online service. From your first assessment to delivery at your door, everything is designed to feel clear, private, and easy to manage.
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