What is the recommended dosage for Dutasteride?

Hair Loss: 0.5 mg/day (off-label)

What are the side effects of Dutasteride?

Potential side effects include: Decreased libido (more common than finasteride), Erectile dysfunction, Ejaculation disorders, Gynecomastia (breast tissue growth), Very long half-life (~5 weeks) means slow side effect resolution.

How does dutasteride compare to finasteride for hair loss?

Dutasteride inhibits both type I and type II 5-alpha reductase enzymes, while finasteride only inhibits type II. This broader mechanism may result in greater DHT reduction (approximately 90% vs 70%). A 2014 study in the Journal of the American Academy of Dermatology found dutasteride 0.5 mg superior to finasteride 1 mg for increasing hair count at 24 weeks. However, dutasteride is not FDA-approved for hair loss and may carry a higher side effect risk.

What are the risks of dutasteride for hair loss?

Dutasteride carries similar potential side effects to finasteride, including decreased libido, erectile dysfunction, and mood changes, but these may be more pronounced due to greater DHT suppression. Dutasteride has a much longer half-life (5 weeks vs 6-8 hours for finasteride), meaning side effects may persist longer after discontinuation. It is a prescription medication that requires medical supervision and is not recommended for women.

How long does dutasteride take to work for hair loss?

Clinical trials on dutasteride for androgenetic alopecia typically measure outcomes at 6 to 24 months. Research across 43 studies with 12,060 participants shows significant improvements in hair count and density by 12 months in the majority of studies. Like all 5-alpha-reductase inhibitors, dutasteride requires continued use — stopping treatment typically results in gradual reversal of regrowth within 6 to 12 months.

What dosage of dutasteride is used for hair loss?

Most clinical studies on dutasteride for androgenetic alopecia used 0.5 mg daily, the same dose approved for benign prostatic hyperplasia. Some research has also explored 0.02 mg and 0.1 mg doses with positive results. Dutasteride is a prescription medication and should only be used under medical supervision. The evidence base of 43 studies with 12,060 participants establishes its Grade A (Strong) rating.

Can women use dutasteride for hair loss?

Dutasteride is not approved for use in women and is contraindicated in women who are or may become pregnant, as it can cause birth defects in male fetuses. The clinical evidence of 43 studies with 12,060 participants is primarily in men with androgenetic alopecia. Some off-label use in postmenopausal women has been studied in small trials, but the safety and efficacy data for women remain limited. A dermatologist should guide any consideration of dutasteride for female hair loss.

Dutasteride

pharmaceutical

Also known as: Avodart

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About

Dutasteride is a dual 5-alpha-reductase inhibitor (Type I and II) that reduces DHT by approximately 90%, compared to 70% with finasteride. While not FDA-approved for hair loss, research suggests it may be more effective than finasteride for androgenetic alopecia.

How It Works

Dual 5-alpha-reductase inhibitor (Type I and II), reducing DHT by ~90%, more potent than finasteride.

Evidence For Conditions

Condition	Grade	Studies	Participants
Androgenetic Alopecia	A	99	19921	View →

Side Effects

Decreased libido (more common than finasteride)
Erectile dysfunction
Ejaculation disorders
Gynecomastia (breast tissue growth)
Very long half-life (~5 weeks) means slow side effect resolution

Drug & Supplement Interactions

CYP3A4 inhibitors (ketoconazole, ritonavir) may increase dutasteride levels
May affect PSA levels (reduces by ~50%)
Contraindicated in pregnancy (Category X teratogen)

Always inform your healthcare provider about all supplements you take.

Related Ingredients

Finasteride Minoxidil Spironolactone

Quick Facts

Dosage: Hair_Loss: 0.5 mg/day (off-label)
Forms: capsule
Upper Limit: 0.5 mg/day
Best Time: Once daily at the same time, with or without food; prescription required

Evidence Summary

Androgenetic Alopecia A

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.