Finasteride vs Minoxidil: What to Choose and for Whom

“Which is better — finasteride or minoxidil?” is one of the most frequent questions about hair loss. The correct answer sounds like this: it depends on who is asking, what stage of the process they are at and what their future plans are. The editorial team has broken down the typical situations in which one or the other drug has the advantage, and explained when their combination is appropriate.

Before choosing: confirm the diagnosis

Both drugs make sense only for androgenetic alopecia. However, hair loss can also have other origins: telogen effluvium after illness, stress, sudden weight loss or childbirth, alopecia areata, iron deficiency, thyroid dysfunction, side effects of medications. In these cases, neither finasteride nor minoxidil eliminates the cause.

A dermatologist or trichologist usually assesses the nature and location of the thinning, performs trichoscopy and, if necessary, orders tests: a complete blood count, ferritin, TSH, and in women — androgen levels if there are signs of their excess. For men, the stage is assessed using the Hamilton–Norwood scale, for women — the Ludwig scale.

The stage has practical significance. In the early phases, when the follicles are still alive but miniaturized, drug therapy gives the best results. In the late stages, when the frontal zone is already smooth, the drugs can only preserve existing hair, while restoration is possible mainly through surgery.

It is also worth honestly assessing expectations. No drug produces an effect within a few weeks: assessing the result requires at least 6–12 months of regular use. Someone who is not ready for long-term treatment risks being disappointed with any option.

Who finasteride suits better

Finasteride is a logical choice for an adult man with confirmed androgenetic alopecia, especially if the process is actively progressing. The drug acts on the root cause — the excessive action of DHT on the follicles — so it is exactly what stabilizes the condition best. For many patients the main goal is not to grow new hair but to preserve what they have, and finasteride meets this goal.

An advantage is convenience: one tablet a day instead of daily application of a solution. This matters for those who find it hard to adhere to topical therapy or who experience scalp irritation from solutions.

At the same time, the drug is not suitable for everyone. Men with pronounced anxiety about sexual function, a history of depressive episodes or concerns about hormonal interventions should discuss the risks in detail with a doctor. Prescribing information in the US and EU includes warnings about possible mood changes.

Another detail is PSA. Finasteride lowers prostate-specific antigen levels by about half. Men undergoing prostate cancer screening need to warn their urologist about taking it so that the result is interpreted correctly. The PCPT study showed that finasteride at a dose of 5 mg reduced the overall rate of prostate cancer detection.

Who minoxidil suits better

Topical minoxidil is the drug of choice for women with androgenetic alopecia: it is precisely what the European S3 guideline recommends. Finasteride is contraindicated in women of reproductive age due to the risk to a male fetus, and in postmenopausal women its effectiveness according to studies is ambiguous.

Minoxidil also suits men who do not want or cannot take drugs with hormonal action: those who plan to have children and wish to minimize any interventions, or those who developed side effects on finasteride. Minoxidil does not change the hormonal background and does not affect PSA.

The drawbacks are discipline and cosmetics. The solution is applied daily, the hair may look greasy, and the propylene glycol in the composition often irritates the skin. Foam without propylene glycol is usually tolerated better. At the start of treatment, temporary increased shedding is possible.

People with cardiovascular disease, low blood pressure or arrhythmias should discuss use with a doctor: although systemic absorption with topical application is small, reports of palpitations and edema do exist.

Combination and alternatives

Since the mechanisms of action do not overlap, finasteride and minoxidil are often prescribed together. One curbs the hormonal cause, the other stimulates growth — together this gives a broader effect than each drug separately. For men with a noticeable loss of density, the combination often becomes the standard.

There are also intermediate options. Topical finasteride in the form of a spray is registered in a number of European countries: it lowers blood DHT levels less than a tablet, although systemic action does not disappear entirely. Low-dose oral minoxidil is used off-label when topical forms are inconvenient or irritate the skin.

Dutasteride — an inhibitor of both types of 5-alpha-reductase — lowers DHT more strongly than finasteride. In some countries it is used to treat hair loss, but in Europe and the US it is not registered for this indication. The decision to prescribe it is made only by a doctor.

Special situations

Planning children.Finasteride passes into semen in small amounts, but this amount is believed not to pose a risk to a fetus. At the same time, in some men the drug reduces ejaculate volume. For couples having difficulty conceiving, it is advisable to discuss temporary discontinuation with an andrologist.

Athletes.Neither finasteride nor minoxidil is currently on the WADA Prohibited List (finasteride was on it in 2005–2008 as a masking agent). However, the list is updated annually, so professional athletes should check its current version.

Use of androgens.Anabolic steroids accelerate baldness in predisposed people. The editorial team emphasizes: hair drugs do not make such substances safe, and some synthetic androgens act without the involvement of 5-alpha-reductase. The most effective way to preserve hair in this context is not to use androgens without medical indications.

Young age.An early onset of baldness, especially in people with a family history, is an argument in favor of seeing a doctor early rather than waiting.

Editorial conclusions

For most men with androgenetic alopecia, finasteride is a means of stabilization and minoxidil is a means of stimulating growth; their combination often gives the best result.

For women, the main choice remains topical minoxidil, while finasteride is contraindicated at reproductive age.

Regardless of the choice, treatment lasts for years, and the effect is assessed no earlier than after six months. An early start of therapy is the greatest factor of success.

We also recommend reading the article “Finasteride or Minoxidil: What Is the Difference,” material on the effect of DHT on hair and skin, and a review of the tests worth taking for hair loss.

References

1. Kanti V, Messenger A, Dobos G, et al. Evidence-based (S3) guideline for the treatment of androgenetic alopecia in women and in men – short version. J Eur Acad Dermatol Venereol. 2018;32(1):11–22.
2. Kaufman KD, Olsen EA, Whiting D, et al. Finasteride in the treatment of men with androgenetic alopecia. J Am Acad Dermatol. 1998;39(4 Pt 1):578–589.
3. Olsen EA, Dunlap FE, Funicella T, et al. A randomized clinical trial of 5% topical minoxidil versus 2% topical minoxidil and placebo in the treatment of androgenetic alopecia in men. J Am Acad Dermatol. 2002;47(3):377–385.
4. Thompson IM, Goodman PJ, Tangen CM, et al. The influence of finasteride on the development of prostate cancer. N Engl J Med. 2003;349(3):215–224.
5. Randolph M, Tosti A. Oral minoxidil treatment for hair loss: a review of efficacy and safety. J Am Acad Dermatol. 2021;84(3):737–746.
6. Adil A, Godwin M. The effectiveness of treatments for androgenetic alopecia: a systematic review and meta-analysis. J Am Acad Dermatol. 2017;77(1):136–141.
7. World Anti-Doping Agency. The Prohibited List. Montreal: WADA; щорічне видання.