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Dutasteride
genericFDA-approved for benign prostatic hyperplasia (BPH); used off-label for hair loss
Est. Cost
$10–$59/mo
/month
Dutasteride (brand name Avodart) is a medication originally developed and FDA-approved for the treatment of benign prostatic hyperplasia (enlarged prostate). Because of its more potent DHT-blocking properties compared to finasteride, some dermatologists and hair loss specialists prescribe it off-label for androgenetic alopecia in men who have not achieved satisfactory results with finasteride alone. While several international studies support its use for hair loss, it has not received FDA approval for this indication, and patients should be aware of both its potential benefits and its off-label status.
Dosage Format
0.5mg oral capsule taken once daily
Type
Generic
Best For
Men who have not responded adequately to finasteride and are looking for a more potent DHT-blocking option, with the understanding that dutasteride is prescribed off-label for hair loss.
Key Benefit
Some comparative studies suggest dutasteride may be more effective than finasteride for hair regrowth, likely due to its ability to inhibit both Type I and Type II 5-alpha reductase and achieve greater DHT suppression. However, it is not FDA-approved for hair loss and carries a potentially higher risk of side effects.
Where to Get Dutasteride
Compare providers offering dutasteride — ranked by our editorial team
Happy Head
Offers dutasteride as part of custom compounded topical and oral treatment plans; pricing varies by formulation
$22–$79/mo
/month
How Dutasteride Works
Dutasteride works by inhibiting both Type I and Type II 5-alpha reductase enzymes. While finasteride targets only the Type II isoform, dutasteride's dual mechanism may result in a more thorough suppression of DHT — the androgen most directly linked to follicle miniaturization in male pattern hair loss. Studies have reported that dutasteride can reduce serum DHT by over 90%, compared to roughly 60–70% with finasteride. This more complete DHT blockade is thought to be the reason some men see improved results with dutasteride, particularly those who did not respond fully to finasteride. However, the greater degree of hormonal suppression also means the potential for side effects may be somewhat elevated.
Side Effects
Common
- • Decreased libido (reported at slightly higher rates than finasteride in some studies)
- • Erectile dysfunction (small percentage of users)
- • Reduced ejaculate volume
- • Breast tenderness or mild enlargement
Serious (Rare)
- • Depression or mood changes (rare; discuss with your provider)
- • Allergic reactions including rash, hives, or facial swelling (very rare)
- • Dutasteride has a longer half-life (~5 weeks) than finasteride, meaning side effects may take longer to resolve after discontinuation
- • Potential effects on PSA levels — inform your provider if undergoing prostate cancer screening
Who Is Eligible
Dutasteride is prescribed off-label for hair loss in adult men only. It is not approved for use in women and should be avoided by women who are or may become pregnant due to the risk of birth defects. Because it is an off-label use, not all providers or platforms may offer it for hair loss. A thorough medical evaluation is typically required before prescribing.