Topical vs oral finasteride

Topical finasteride is sold as the gentler version of the hair loss pill: the same drug, applied to the scalp, with less of it reaching the rest of the body. Part of that is backed by a large European trial. The rest of the picture is less tidy. No topical finasteride is FDA-approved, the products sold online are compounded, and in April 2025 the FDA warned about side effects reported with them, naming the telemedicine platforms that market them.

Here is how the two forms compare on approval, results, side effects and October 2026 price.

Approval: one is FDA-approved, one isn’t

Oral finasteride is a label-approved generic. Topical finasteride is prepared by a licensed compounding pharmacy for an individual prescription, which is lawful, but compounded drugs are not reviewed by the FDA for safety, effectiveness or quality. Every topical finasteride product sold by the providers we track combines it with minoxidil, and some add tretinoin, ketoconazole, biotin or a steroid.

What the trials show

The finasteride tablet’s label trials followed 1,879 men aged 18 to 41. At 12 months, 14% of men on finasteride had further hair loss against 58% on placebo, and at 5 years 35% against 100%.

The main evidence for the topical form is a phase III trial at 45 sites in Europe, published in 2022. It randomly assigned 458 men to a 0.25% finasteride spray, the 1 mg tablet or placebo for 24 weeks.

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The spray beat placebo and was close to the tablet, with much less finasteride in the blood. Side effects on the spray were not meaningfully different from placebo. Two limits matter. The trial lasted 24 weeks, and the spray it tested is a specific product made by its sponsor, Almirall, which is not sold in the US. The compounded blends sold online use their own formulas and strengths and were not part of it.

Side effects: what the FDA flagged

The tablet’s label lists postmarketing reports of depression, suicidal ideation and behavior, and sexual problems that continued after stopping, along with male infertility and male breast cancer. In the first-year trials, decreased libido, erectile dysfunction and ejaculation disorder each affected 1.2% to 1.8% of men on finasteride, against 0.7% to 1.3% on placebo. See our finasteride side effects guide.

Less finasteride in the blood could mean fewer of those effects, and in the European trial side effects on the spray were similar to placebo. The FDA’s April 22, 2025 alert is the counterweight. It reported:

• 32 cases in the FDA Adverse Event Reporting System from 2019 to 2024 involving compounded topical finasteride
• erectile dysfunction, anxiety, suicidal ideation, brain fog, depression, fatigue, insomnia, decreased libido and testicular pain
• that most reports said the effects persisted after the product was stopped
• that some compounders and telemedicine platforms market topical finasteride, alone or with minoxidil
• a greater risk of exposing others, especially women, by transfer from treated skin, since compounded topicals lack the protective coating of tablets

The FDA asked clinicians to tell patients about these risks, including transfer to women, and asked consumers to discuss them before starting. Adverse event reports do not prove the product caused the problem, and 32 cases over six years is a small number, but the alert is specific to the products sold online. Scalp irritation, redness, dryness and burning can also occur.

If you choose a topical

The FDA’s concerns point to a few practical steps if you and your clinician settle on topical finasteride:

• Prevent transfer. Wash your hands after applying, let the product dry, and avoid skin contact on treated areas with women who are or may be pregnant and with children.
• Know what is in the bottle. Ask the provider for the strength of each ingredient and the pharmacy that compounds it. Blends that add tretinoin, a steroid or ketoconazole can irritate the scalp more.
• Watch for the effects the FDA listed. Erectile problems, low libido, anxiety, low mood, brain fog or insomnia are worth raising with your clinician promptly.
• Report problems. The FDA asks consumers and clinicians to report side effects and quality problems to MedWatch.

The finasteride label also reports a 12-month study of 137 postmenopausal women in which the tablet showed no improvement over placebo, which is one reason it is approved for men only.

Who each one suits

• Oral finasteride suits men who want the FDA-approved product with years of trial data and the lowest price. It reaches the whole body, so discuss mood and sexual side effects with a clinician first.
• Topical finasteride may suit men who had side effects on the tablet or want less of the drug in their blood, and who accept a compounded, unapproved product. Keep treated skin away from partners who are or may be pregnant, and wash your hands after applying.
• Neither is approved for women. Some providers sell a topical blend for postmenopausal women, and women who are or may be pregnant should not handle crushed or broken tablets.

What each costs in October 2026

These are the published prices at the online providers we track, read on October 18, 2026.

Topical blends cost more than the tablet at every provider that publishes both monthly prices: $35 to $63.20 a month against $17 to $55 for oral finasteride. Some of that is the minoxidil in the bottle. Hims is the lowest topical price here, and Strut Health includes physician visits and shipping in its $59. At Hone Health, the $38 medication price comes on top of a monthly membership: $193 a month with the $155 Premium tier, which Hone says gives full access to its medications.

Compare topical providers on our prescription serums and sprays list and oral prices on our cheapest finasteride list. The topical finasteride and oral finasteride pages hold the label details.

The bottom line

Oral finasteride is the FDA-approved product, with long-term trial data and the lowest price. Topical finasteride kept most of the benefit with much less drug in the blood in one European trial, but the products sold online are compounded, untested in that trial, and the subject of a 2025 FDA alert about lasting sexual and psychiatric side effects.

If side effects worry you, raise them with a licensed clinician before choosing either form, and see all providers on our hair loss hub.