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Dutasteride

Does it work for androgenetic alopecia?

Last reviewed (demo): 2025-11-10

Prototype rating

Verdict

Likely works

Evidence

B

Strong

Effectiveness

88/100

Why this score?

Trials show hair-count gains exceeding placebo and generally exceeding finasteride at equivalent time points, particularly at higher doses.

Safety

68/100

Why this score?

Side effects mirror finasteride but DHT suppression is stronger and the drug persists longer in the body. Long-term safety monitoring under medical supervision is important.

User Score

7.0/10

Prototype sentiment

Confidence

High

Prototype confidence

Good evidence suggests this treatment works for most people. All scores on this page are prototype placeholders — not validated ProofCritic ratings and not calculated from the study index below.

Quick facts

Treatment type
Oral medication
Prescription
Yes
Time to results
3–6 months
Typical usage
Male pattern hair loss, especially when finasteride underperforms
Maintenance
Continuous — effects reverse if stopped
Typical cost
€€
Real data

The Evidence at a Glance

Calculated from publications ProofCritic has indexed from scientific databases (PubMed / Europe PMC). Metrics ProofCritic cannot yet calculate reliably are shown as “Not yet calculated” — never estimated.

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“Research indexed by ProofCritic” means real publication metadata has been stored — it has not yet been human-verified and does not influence the prototype rating above. How verification works →

Science vs Real World

Science

  • Clinical outcomes measured in studies
  • Study populations & their limitations
  • Adverse events recorded by researchers
  • Publication & verification status per source

Dutasteride's scientific rating is based on indexed publications — see The Evidence at a Glance.

Real World

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First-party user reports are collected on this page and stored for moderation. They are never mixed into the scientific evidence.

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The Bottom Line

Dutasteride appears at least as effective as finasteride for male pattern loss, and possibly more so, but carries a similar-or-greater side-effect burden and remains off-label in many countries. A specialist-guided option rather than a first step.

Benefits & drawbacks

Potential benefits

  • Greater DHT suppression than finasteride in head-to-head trials
  • Effective for some men who do not respond to finasteride
  • Approved for androgenetic alopecia in several countries

Potential drawbacks

  • Off-label for hair loss in many jurisdictions
  • Side-effect profile similar to finasteride, potentially more pronounced
  • Longer half-life means side effects may linger after stopping
  • Requires a prescription and specialist familiarity

More detail

Why ProofCritic rates it this way — evidence breakdown
  • Quantity of evidence: Substantial but smaller than finasteride; fewer hair-loss-specific long-term studies.
  • Study quality: Includes good randomized trials and meta-analyses, some head-to-head with finasteride.
  • Consistency: Directionally consistent: superior DHT suppression and comparable-or-better hair outcomes.
  • Relevance: Directly studies androgenetic alopecia, though at various doses and regimens.
  • Duration: Most trials 6–12 months; fewer multi-year extensions than finasteride.
  • Limitations: Off-label use means many reports are observational; dosing schedules vary between studies.

Real-world experience (prototype): Often chosen by finasteride non-responders. Satisfaction is high when results improve; anxiety about persistent side effects is the dominant negative theme.

How it works — mechanism

Dutasteride inhibits both type I and type II 5-alpha-reductase, suppressing DHT more completely than finasteride, which blocks only type II.

Who it may suit / who should be cautious

Who it may suit: Men whose hair loss progresses despite finasteride, under medical supervision.

Who should be cautious: Women of childbearing age; men with liver conditions or planning fertility treatment should discuss with a doctor first.

Side effects to know about
  • Reduced libido or erectile changes in a minority
  • Breast tenderness or enlargement (rare)
  • Possible mood effects; monitor and discuss with your doctor

Not a complete list. Speak to a pharmacist or doctor for guidance specific to you.

Your experience

Have you tried this treatment? Share your experience

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