Dutasteride for hair loss

In short: dutasteride is a stronger relative of finasteride. It blocks both types of the enzyme that makes DHT. It's approved for hair loss in a few countries and used off-label in India, usually when finasteride hasn't worked well enough. It's prescription-only and stays in the body for months after you stop.

Prescription medicine, off-label use for hair. → Disclaimer

How it works

Dutasteride blocks 5-alpha reductase types I and II, cutting blood DHT by over 90% (finasteride lowers it by about two-thirds). Less DHT means less follicle shrinkage.

It was developed for an enlarged prostate. The 0.5 mg capsule is the standard strength. Dutasteride combined with tamsulosin is a prostate medicine, not a hair treatment.

Does it work?

• In a head-to-head trial, dutasteride 0.5 mg grew more hair than finasteride 1 mg over 24 weeks.
• It's approved for male pattern baldness in South Korea and Japan.
• Long-term hair data is more limited than for finasteride. → Finasteride vs dutasteride

Who it's for

• Men with male pattern baldness who didn't respond enough to finasteride after about 12 months
• Selected men with fast-progressing loss, under a dermatologist

Not for women who are or could become pregnant (they must not handle leaking capsules), children, or men with liver disease without specialist advice. Tell your doctor if you're planning a baby.

Tablets vs mesotherapy (scalp injections)

Some clinics inject small amounts of dutasteride into the scalp to reduce exposure throughout the body. Studies are small, protocols vary, and costs are per session. Ask what dose they use, how many sessions, the total cost, and what evidence they rely on.

Side effects

Similar in type to finasteride: lower sex drive, erection or ejaculation changes, breast tenderness, and mood changes. Regulators have reviewed reports of depression and suicidal thoughts with this class of medicine. Because dutasteride stays in the body for months, side effects may take longer to settle after stopping. → Finasteride side effects (much of it applies)

Also:

• PSA: lowers readings by about half. Tell your doctor before any prostate test.
• Blood donation: a long wait is needed after stopping.

Cost in India

Generic dutasteride 0.5 mg is widely available. In October 2026, 30 capsules cost about ₹150 at Jan Aushadhi MRP (₹50 per 10) and about ₹1,067 for Dutas (Dr. Reddy's) on PharmEasy, with other brands such as Veltride (Intas) in between. Mesotherapy per session: price being updated.

Questions to ask your dermatologist

1. Why dutasteride instead of continuing finasteride?
2. Daily, a few times a week, or injections?
3. How will we monitor side effects, and for how long would they last if they happen?
4. I'm planning children in [timeframe]. What should I do?

See a doctor soon if you have: round bald patches that appear suddenly · hair coming out in clumps · redness, pain, pus, scaling or scarring on the scalp · hair loss with fever, weight loss, irregular periods, acne or new facial hair · eyebrow or eyelash loss · hair loss in a child.

Sources

1. Gubelin Harcha W, et al. J Am Acad Dermatol. 2014;70:489–98.
2. Dutasteride prescribing information.
3. EMA PRAC review of finasteride- and dutasteride-containing medicines (2025).

Medical review pending: not yet reviewed by a dermatologist. Medical disclaimer