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Minoxidil 5mg + Dutasteride 0.5mg is a once-daily oral combination treatment for male pattern hair loss (androgenetic alopecia), pairing a vasodilator (minoxidil) with a dual 5-alpha-reductase inhibitor (dutasteride) that suppresses DHT more completely than finasteride. Dutasteride is approved specifically for hair loss in South Korea, Japan, and Taiwan, but remains an off-label use in the US, UK, and most other markets, where it is officially approved only for benign prostatic hyperplasia (enlarged prostate). A network meta-analysis comparing minoxidil and 5-alpha-reductase inhibitor monotherapies found dutasteride 0.5mg/day to be the most effective single option for male pattern hair loss. This combination is for men only.
| Attribute | Details |
|---|---|
| Active Ingredients | Minoxidil 5mg + Dutasteride 0.5mg |
| Drug Classes | Potassium channel opener (minoxidil) + dual 5-alpha-reductase inhibitor (dutasteride) |
| Indication | Male androgenetic alopecia (off-label in most markets; approved for hair loss in South Korea, Japan, Taiwan) |
| Who It’s For | Adult men only — not suitable for women |
| Dose | One tablet once daily, same time each day, with or without food |
| Half-Life | Dutasteride has a long half-life (~5 weeks) versus finasteride’s 6–8 hours — it stays in the body much longer after stopping |
| Time to Results | Initial changes typically at 3–6 months; full results assessed at 12 months |
| Form / Route | Oral tablet — do not crush or chew |
| Prescription | Required in all markets |
Dutasteride blocks both type 1 and type 2 5-alpha-reductase enzymes, reducing serum DHT by around 92% compared to roughly 70% for finasteride, while minoxidil independently increases scalp blood flow and extends the hair growth (anagen) phase. Because dutasteride inhibits both enzyme types rather than just one, it achieves more complete DHT suppression than finasteride — which is the basis for evidence showing it as the single most effective monotherapy option, before even adding minoxidil’s separate growth-stimulating mechanism.
A network meta-analysis of current evidence found dutasteride 0.5mg/day to be the most effective option among all minoxidil and 5-alpha-reductase inhibitor treatments studied for male pattern hair loss, ahead of both oral finasteride and topical minoxidil. Direct evidence for the oral minoxidil + dutasteride combination specifically is more limited than for minoxidil + finasteride — it currently consists mainly of case reports and small studies rather than large retrospective cohorts. One published case report described a man with advanced (Grade 5) pattern baldness who saw new hair growth within a short period after starting combined oral minoxidil and dutasteride, with minimal side effects. Larger controlled studies directly comparing the combination against either drug alone are still needed.
Dutasteride blocks both type 1 and type 2 5-alpha-reductase, while finasteride blocks only type 2 — this is why dutasteride achieves deeper DHT suppression, but it also means dutasteride stays in the body far longer after stopping treatment, due to its roughly 5-week half-life versus finasteride’s 6–8 hours. This longer half-life is an important consideration for men planning to conceive, as it takes significantly longer for dutasteride to clear the body.
Reported side effects with dutasteride are broadly similar to finasteride, occurring in around 5% of patients, and are generally transient.
Evidence suggests dutasteride achieves deeper DHT suppression and was found to be the most effective single option in a network meta-analysis of male pattern hair loss treatments, but it also has a much longer half-life, meaning effects (and any side effects) persist longer after stopping. The right choice depends on individual factors a prescribing doctor should assess.
No — dutasteride is FDA-approved only for benign prostatic hyperplasia in the US and is used off-label for hair loss, though it is specifically approved for androgenetic alopecia in South Korea, Japan, and Taiwan.
Dutasteride has a half-life of approximately 5 weeks, compared to finasteride’s 6–8 hours, meaning its effects — and any associated side effects — clear much more slowly after discontinuation.
No. Dutasteride is not approved for use in women, particularly those who are or may become pregnant, due to the risk of harm to a male fetus.
Initial visible changes typically appear at 3–6 months, with full results best assessed at the 12-month mark, consistent with other oral hair-loss combination therapies.
Store at 15–30°C, away from sunlight and moisture. Keep out of reach of children and women who are or may become pregnant — capsules should not be handled if leaking.
Medically reviewed. Last updated: [20/06/2026]. This content is for informational purposes and does not replace consultation with a licensed physician.
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