Finasteride works. The question is whether oral 1 mg or topical 0.1–0.25% is the better fit for your situation. The head-to-head data says they achieve similar scalp DHT reduction — with meaningfully different systemic exposure and side effect profiles.
Oral finasteride 1 mg daily: longest safety track record, cheapest, most effective for hairline coverage, but 2–4% of men report sexual side effects.
Topical finasteride 0.1–0.25%: comparable scalp DHT suppression, substantially lower systemic absorption, lower incidence of sexual side effects in published studies of topical finasteride generally; there is no FDA-approved topical finasteride in the US, so it requires compounding and is not FDA-approved.
| Factor | Oral 1 mg | Topical 0.1–0.25% |
|---|---|---|
| Application | Swallow pill daily | Apply solution to scalp daily |
| Scalp DHT reduction | ~60–70% | Comparable (head-to-head studies) |
| Systemic DHT reduction | Full (~60–70%) | Partial (~30–40% lower exposure than oral) |
| Sexual side effects | 2–4% incidence | Lower in studies (due to lower systemic absorption) |
| Scalp irritation risk | Minimal | Possible (less common with well-formulated vehicles) |
| Combination options | Take with separate topical minoxidil | Single bottle with minoxidil (2-in-1) or with minoxidil + tretinoin (3-in-1) |
| Track record | Since 1997 (FDA-approved) | Shorter clinical literature, growing evidence |
| Availability | Generic, widely available | Compounded, not FDA-approved; prepared by a licensed 503A compounding pharmacy (for example Hallandale Pharmacy or Valiant Compounding Pharmacy), named on your prescription label |
| YourMD price | $29/month | $35/month (fin + minoxidil, with or without tretinoin) |
A small number of men report persistent sexual side effects even after discontinuing oral finasteride — referred to as post-finasteride syndrome (PFS). The medical literature is debated: some researchers consider PFS a real entity, others attribute reported cases to nocebo effect or confounding variables. What's clear is that sexual side effects are usually reversible, but rare persistent effects have been reported. For patients concerned about this possibility, starting with topical (lower systemic exposure) is a reasonable risk-reduction strategy.
Some patients use low-dose oral finasteride (0.25–0.5 mg every other day) combined with topical minoxidil. Others use topical finasteride for 6–12 months and, if tolerated well and results are incomplete, add low-dose oral for additional DHT suppression. These approaches require physician oversight and aren't appropriate for everyone — discuss with your YourMD physician.
For a first-time finasteride patient with no specific concerns, oral 1 mg is a reasonable starting point with the longest track record. For patients who have had sexual side effects before, who are concerned about systemic exposure, or who want the convenience of a combination topical, starting with topical (especially the 3-in-1 compounded combo with minoxidil and tretinoin) makes sense. Both achieve the same goal; the right choice is about your risk tolerance and convenience preferences.
Medical disclaimer: Educational content, not medical advice. Page reviewed by Teja V. Surapaneni, MD, MS (NV, WA, OR, WI). Last reviewed: April 17, 2026