Prescription Hair Loss Treatment: Stop It Where It Starts
Quick Answer
Finasteride is an FDA-approved oral medication that blocks DHT — the hormone responsible for male pattern hair loss. Clinical trials show it stops hair loss in ~90% of men and promotes regrowth in ~65%. At Marrow, finasteride prescriptions start at $85/month.
Male pattern hair loss (androgenetic alopecia) affects approximately 50% of men by age 50 and up to 80% by age 70. It's not just cosmetic — it impacts confidence, self-image, and mental health. The good news: it's a well-understood hormonal process with effective, evidence-backed treatments. The most effective pharmaceutical intervention is finasteride, a prescription medication that addresses the root hormonal cause rather than masking symptoms.
Why hair loss happens
Male pattern hair loss is driven by a hormone called DHT (dihydrotestosterone). DHT is a byproduct of testosterone — an enzyme called 5-alpha reductase converts testosterone into DHT. In genetically susceptible hair follicles, DHT binds to androgen receptors and triggers a process called follicular miniaturization: the follicle gradually shrinks, produces thinner and shorter hair, and eventually stops producing visible hair altogether.
This process is progressive and predictable — it typically starts at the temples and crown, following the Norwood scale pattern. The key insight: it's not about how much testosterone you have. It's about how much DHT reaches your follicles and how sensitive those follicles are to it. That sensitivity is genetic. The DHT itself is addressable.
What finasteride does
Finasteride is a 5-alpha reductase inhibitor. It blocks the enzyme that converts testosterone to DHT, reducing circulating DHT levels by approximately 70%. With less DHT attacking susceptible follicles, the miniaturization process slows dramatically or stops entirely — and in many cases, partially reverses.
At the standard 1mg daily dose for hair loss, finasteride is highly targeted. It doesn't affect testosterone levels meaningfully — most men see no change in total or free testosterone. It specifically reduces the conversion of testosterone to DHT, addressing the cause of hair loss without disrupting broader hormonal balance.
Clinical evidence
Finasteride has been studied extensively since its FDA approval for hair loss in 1997. Key findings:
~90%
of men stop losing hair
~65%
experience visible regrowth
1-2%
report sexual side effects
Source: Sinclair R et al. “Finasteride for Male Pattern Hair Loss.” J Am Acad Dermatol 2005; Kaufman KD et al. “Finasteride in the treatment of men with androgenetic alopecia.” J Am Acad Dermatol 1998.
Topical vs oral finasteride
Oral finasteride (1mg daily) is the gold standard with the most clinical data. Topical finasteride is a newer formulation applied directly to the scalp, designed to achieve local DHT reduction with potentially lower systemic absorption. Early studies suggest comparable efficacy to oral finasteride with potentially fewer systemic side effects, though long-term data is still accumulating.
At Marrow, we offer both oral finasteride ($85/mo) and a topical finasteride + minoxidil combination ($95/mo). Your physician will recommend the best approach based on your hair loss pattern, preferences, and health history.
Combination therapy
The most effective non-surgical approach to hair loss combines finasteride (addresses the hormonal cause) with minoxidil (stimulates growth locally). Studies show the combination produces significantly better results than either treatment alone. Finasteride stops the loss. Minoxidil promotes new growth. Together, they work on the problem from two different angles.
Marrow's topical combination formula ($95/mo) delivers both finasteride and minoxidil in a single daily application, simplifying the routine and improving adherence. Learn more about our hair loss treatment options.
Side effects — an honest assessment
We believe in transparency. Finasteride's most discussed side effects are sexual: decreased libido, erectile changes, and reduced ejaculate volume. In clinical trials, these occurred in approximately 1-2% of men — similar to placebo rates in some studies. They are reversible upon discontinuation.
The concept of “post-finasteride syndrome” (persistent side effects after stopping) has been reported anecdotally but has not been confirmed in controlled clinical studies. The FDA does include a warning based on post-marketing reports. Your Marrow physician will discuss the full risk-benefit profile with you, so you can make an informed decision.
Pricing
Oral finasteride at Marrow: $85/month. Topical finasteride + minoxidil combo: $95/month. Both include physician oversight, prescriptions, and free shipping. Unlike pharmacy-only pricing, Marrow includes physician management — so you're getting the same medication cost plus professional oversight at no extra charge.
View full pricing details.
How to start
Complete your intake
A 5-minute questionnaire about your hair loss pattern, health history, and goals.
Physician review
A licensed physician reviews your intake within 24 hours and prescribes the appropriate treatment.
Prescription ships
Your finasteride ships to your door within 3-5 business days. Free shipping, always.
Frequently asked questions
Does finasteride actually work?
Yes. Multiple large-scale clinical trials demonstrate that finasteride stops hair loss progression in approximately 90% of men and promotes visible regrowth in approximately 65% of men. It's the most evidence-backed pharmacological treatment for male pattern hair loss available.
What are finasteride's side effects?
The most commonly reported side effects are sexual in nature — decreased libido and erectile changes — occurring in approximately 1-2% of men in clinical trials. These side effects are reversible upon discontinuation. Your Marrow physician will discuss the risk-benefit profile during your consultation.
How long does finasteride take to work?
Most men notice reduced hair shedding within 3-4 months. Visible regrowth, particularly at the crown, typically becomes apparent at 6-9 months. Maximum results are usually achieved by 12-18 months of consistent use. Patience is essential — this is not an overnight fix.
Is finasteride or minoxidil better?
They work through different mechanisms and are most effective when combined. Finasteride addresses the hormonal root cause by blocking DHT production. Minoxidil is a topical vasodilator that stimulates growth locally. Using both together produces superior results to either alone.
Do I have to take finasteride forever?
To maintain results, yes — hair loss resumes if treatment is discontinued because the underlying hormonal process (DHT production) continues. Most patients view it as a simple daily habit. The cost of sustained treatment is typically far less than surgical alternatives.
Can finasteride regrow hair or just stop loss?
Both. Finasteride primarily prevents further loss, but clinical data shows approximately 65% of men experience measurable regrowth, particularly at the crown and midscalp. The earlier you start treatment, the more hair you have to preserve and the better your results will be.
Is this treatment available for women?
Oral finasteride is typically prescribed for men. Women experiencing hair loss may benefit from other treatments — complete your intake and your physician will recommend the most appropriate approach based on your specific situation.
Stop hair loss for $85/mo
Prescription finasteride with physician oversight. Results in 3-6 months.
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