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This article summarizes published evidence — an FDA safety communication, FDA-approved drug labeling, and a published phase III randomized trial, each cited below. It is written by journalists, not clinicians, and has not been reviewed by a physician. Talk to a doctor or a board-certified dermatologist before starting or stopping any treatment. Full medical disclaimer.
This page discusses adverse events that include suicidal ideation, because a US regulator listed them in a public safety communication about these products. If you are struggling, that is worth raising with a clinician rather than a website.
What the status labels on this page mean
- FDA-approved
- The FDA reviewed the evidence and approved this drug for pattern hair loss.
- Compounded
- Mixed to order by a pharmacy. Not FDA-approved, and not reviewed by the FDA for safety, effectiveness or quality.
What this page found
- In a phase III randomized trial, topical finasteride produced +20.2 hairs at 24 weeks against +21.1 for the oral tablet and +6.7 for placebo. On that measure the two were close.[1]
- It suppressed circulating DHT less — 34.6% versus 55.6% — and peak blood levels of finasteride were more than 100 times lower than with the pill.[1]
- But that trial tested a standardized manufacturer spray. It is not the product US telehealth brands sell you, and it is not evidence about compounded formulations.
- The FDA states there is no FDA-approved topical finasteride and issued a safety alert on 22 April 2025 after 32 adverse event reports between 2019 and 2024.[2]
- The specific marketing claim the FDA called out as false is the one you will hear most: that a topical carries no risk of side effects because it is applied to the skin.[2]
The real question is not oral versus topical
Search for this comparison and you will find dozens of pages weighing a pill against a spray. Almost none of them mention the thing that actually separates the two options in the United States, which is that one of them is an FDA-approved medicine with a generic version, and the other is not an approved product at all.
Oral finasteride FDA-approved has been approved for male pattern hair loss since the 1990s and has been generic for years.[3] Topical finasteride Compounded is compounded — mixed to order by a pharmacy for an individual prescription. The FDA’s position is unambiguous: there is currently no FDA-approved topical formulation of finasteride, and compounded topical finasteride products do not have FDA-approved labeling.[2]
That is not a technicality. It changes what the evidence below can and cannot tell you.
What the phase III trial found
There is one good head-to-head trial, and it is genuinely encouraging for the topical route.
What the trial found
Piraccini BM, Blume-Peytavi U, Scarci F, et al. Journal of the European Academy of Dermatology and Venereology, 2021
- Design
- Phase III randomized controlled trial, 24 weeks, randomized 2:2:1
- Participants
- 458 men — topical finasteride (n=189), placebo (n=184), oral finasteride 1 mg (n=85)
- Main result
- Change in target area hair count at week 24: topical +20.2, oral +21.1, placebo +6.7. Topical was significantly superior to placebo (P<0.001) and numerically similar to oral.[1]
Stated limitation: The trial ran 24 weeks. It does not tell you what happens over one year, two years or five, which is the timescale on which people actually take these drugs. The oral arm was also less than half the size of the other two.
Source: published phase III trial[1].
Change in target area hair count at 24 weeks (phase III trial)
FDA-approved Trial formulation — the spray used in the trial, not a product you can buy Placebo
Less systemic exposure — which cuts both ways
The mechanistic result is the most interesting part of the trial. Topical finasteride reduced circulating DHT by 34.6% from baseline at 24 weeks, against 55.6% for the oral tablet. Peak plasma concentrations of the drug were more than 100 times lower with the topical.[1]
Read one way, that is the whole argument for topical: similar effect on the scalp, far less drug circulating around the rest of you. Read another way, it is a caution — the topical was still measurably suppressing a systemic hormone, which means it is not staying entirely where you put it.
What the side effect numbers showed
| Outcome, 24 weeks | Topical (n=181) | Placebo (n=181) | Oral (n=84) |
|---|---|---|---|
| Any treatment-emergent adverse event | 41.4% | 42.0% | 48.8% |
| Treatment-related adverse event | 9.9% | 6.6% | 11.9% |
| Sexual adverse events | 2.8% | 3.3% | 4.8% |
| Discontinued due to sexual adverse events | 0% | 1.1% | 2.4% |
Two things are worth noticing. Sexual adverse events were lower in the topical arm than in the oral arm — but they were also lower than placebo, which tells you the sample is too small to draw a firm conclusion from that comparison. And nobody in the topical arm stopped because of them.
For context on the oral drug over longer periods, a meta-analysis of 15 double-blind randomized trials covering 4,495 men found a relative risk of 1.66 for sexual adverse effects with finasteride 1 mg versus placebo.[4] We go through those numbers in our side effects guide.
The gap nobody puts in the comparison
The trial product is not the product you can buy. The phase III study tested a single standardized spray formulation made by a manufacturer to a fixed specification. Every topical finasteride sold in the United States is compounded — mixed by a pharmacy, per prescription, with its own choice of concentration, vehicle and additional ingredients. Concentration, absorption and excipients all differ. Applying this trial’s efficacy and safety numbers to a compounded product from a telehealth brand is not something the trial supports, and the difference between standardized and compounded preparations is precisely why the FDA issued its alert.
To their credit, two of the brands selling these products say so themselves on their own product pages. XYON states that its product is a compounded prescription medication and is not FDA-approved.[5] Strut Health states that compounded prescription products have not been tested or approved by the FDA for their intended use.[6] Those are their words, not ours.
The April 2025 FDA safety alert
What the FDA published on 22 April 2025
The agency alerted health care providers, compounders and consumers to potential risks associated with compounded topical finasteride products, stating that no topical finasteride formulation is FDA-approved and that compounded versions lack FDA-approved labeling.[2]
It described 32 reports of adverse events received between 2019 and 2024. The reported events included erectile dysfunction, anxiety, suicidal ideation, brain fog, depression, fatigue, insomnia, decreased libido and testicular pain, alongside local reactions including irritation, redness, dryness and scaling, stinging and burning.[2]
It advised prescribers to educate patients about potential risks including those arising from handling the product and transference to women.[2]
And it noted that some prescribers had falsely stated there was no risk of any adverse event because the product was topical.[2]
FDA safety communication, 22 April 2025.
Adverse event reports are voluntary and do not by themselves establish that a product caused an effect. But the last point above is not about causation — it is the regulator telling the market that a specific sales claim is untrue. If a service tells you a topical carries no systemic risk because it goes on your scalp, you now know what the FDA thinks of that sentence.
What each one costs a year
| Route | Annual cost | FDA status |
|---|---|---|
| Generic oral finasteride with a pharmacy coupon | ~$117[9] | FDA-approved |
| Ro oral finasteride, 12-month plan | $192[8] | FDA-approved |
| Hims topical finasteride & minoxidil spray | ~$420[7] | Compounded |
| Ro Mane Spray, quarterly plan | $600[8] | Compounded |
| Strut Health Hairfect Rx topical | ~$708[6] | Compounded |
| XYON topical finasteride gel | $1,308[5] | Compounded |
The topical route costs between three and eleven times the oral route depending on which you compare, for a product with no approved version and no generic. Full pricing, including the fees that never appear on a pricing page, is in what hair loss treatment actually costs per year.
Who each one suits
| Oral finasteride may suit you if you… | Topical may be the conversation if you… |
|---|---|
| Want the option with FDA approval, a generic, and decades of trial data | Have tried oral finasteride and could not tolerate it |
| Care about cost, since it is three to eleven times cheaper | Are working with a prescriber who has specifically proposed it for your situation |
| Want a treatment with published multi-year follow-up | Understand and accept that you are buying an unapproved compounded product |
| Would rather take a tablet than apply something daily | Have read the FDA alert rather than only the marketing |
This is a prescriber’s call, not a website’s
Both forms are prescription-only, and choosing between them depends on your history, not on an average from a 24-week trial. Sesame Care is a US marketplace that lists what a consultation costs upfront in cash, including hair loss visits, so you can price the conversation before booking it.
Sesame Care is a US telehealth marketplace that lists upfront cash prices for appointments. The link below is an affiliate link: if you book, we may earn a commission at no extra cost to you.
See hair loss consultation prices →We could not obtain longer-term controlled data for topical finasteride — the phase III trial we cite ran 24 weeks, and we found no published randomized trial comparing a compounded topical finasteride with either placebo or the oral drug. That absence is itself the point of this article, and it is why we have not put efficacy numbers next to any brand’s product.
Where to go next
Frequently asked questions
Is topical finasteride FDA approved?
No. The FDA states directly that there is currently no FDA-approved topical formulation of finasteride, and that compounded topical finasteride products do not have FDA-approved labeling. Every topical finasteride sold in the US is compounded to order by a pharmacy.
Is topical finasteride safer than the pill?
That is exactly the claim the FDA singled out. In its April 2025 alert the agency noted that some prescribers had falsely stated there was no risk of adverse events because a product was topical. The phase III trial did report lower systemic exposure and numerically fewer sexual side effects than oral, but it also reported side effects in the topical group, and that trial tested a standardized manufacturer formulation rather than a compounded one.
Does topical finasteride work as well as the pill?
In the phase III trial, topical finasteride increased target area hair count by 20.2 hairs at week 24 versus 21.1 for oral finasteride and 6.7 for placebo. Both active arms beat placebo. That trial ran 24 weeks and tested one specific standardized spray formulation.
Why does topical finasteride cost so much more?
Because there is no generic. Compounded products are mixed per prescription in small batches rather than mass-produced. Published annual costs range from roughly $420 for a compounded spray to $1,308 for a topical gel, against roughly $117 to $192 a year for oral finasteride depending on how you buy it.
What adverse events did the FDA report?
The FDA said it received 32 reports of adverse events associated with compounded topical finasteride between 2019 and 2024. The reported events included erectile dysfunction, anxiety, suicidal ideation, brain fog, depression, fatigue, insomnia, decreased libido, testicular pain, and local reactions such as irritation, redness, dryness, stinging and burning.
Can topical finasteride affect a pregnancy?
The FDA’s alert specifically advised prescribers to educate patients about risks including those arising from handling the product and transference to women. Finasteride can cause abnormalities in the external genitalia of a male fetus, and a compounded topical does not have the protective coating a finished tablet has.
Sources
- Piraccini BM, Blume-Peytavi U, Scarci F, et al.; Topical Finasteride Study Group. Efficacy and safety of topical finasteride spray solution for male androgenetic alopecia: a phase III, randomized, controlled clinical trial. J Eur Acad Dermatol Venereol. 2021. PMC9297965.
- U.S. Food and Drug Administration. FDA alerts health care providers, compounders and consumers of potential risks associated with compounded topical finasteride products. 22 April 2025. fda.gov
- U.S. Food and Drug Administration. PROPECIA (finasteride) tablets, prescribing information. 2022. accessdata.fda.gov
- Lee S, Lee YB, Choe SJ, Lee WS. Adverse sexual effects of treatment with finasteride or dutasteride for male androgenetic alopecia: a systematic review and meta-analysis. Acta Derm Venereol. 2019. medicaljournals.se
- XYON Health. Topical finasteride SiloxysSystem Gel. xyonhealth.com (checked 8 September 2026)
- Strut Health. Finasteride hair loss formula. struthealth.com (checked 8 September 2026)
- Hims. Topical Finasteride & Minoxidil Spray. hims.com (checked 8 September 2026)
- Ro. Pricing. ro.co/pricing (checked 8 September 2026)
- GoodRx. Finasteride prices and coupons. goodrx.com/finasteride (checked 8 September 2026)
Affiliate disclosure: this page contains affiliate links. We may earn a commission when you buy through them, at no additional cost to you. Commissions never determine what we cover or what the evidence sections say. Read our full affiliate disclosure.
How we researched this: every figure on this page is sourced to a numbered reference below. For this article those sources are an FDA safety communication, FDA-approved drug labeling, a published phase III randomized trial, a meta-analysis, and each brand’s own product and pricing pages. Where a figure could not be verified from a primary source, we say so in the text rather than estimating. Prices were checked on the date shown at the top of this page and change frequently. We do not test products and we do not practice medicine. See our review methodology.
