Dutasteride Research Guide

Full name: Dutasteride (Avodart)

A dual 5-alpha reductase inhibitor (type I and II) that blocks ~90% of DHT production, compared to finasteride's ~70%. Increasingly prescribed off-label for androgenetic alopecia when finasteride alone is insufficient.

How Dutasteride Works

Inhibits both type I and type II 5-alpha reductase isoenzymes, reducing serum DHT by ~90% and scalp DHT by ~50%. Prevents miniaturization of androgen-sensitive hair follicles in the vertex and frontal scalp.

Dosing Protocol

• Typical dose: 0.5 mg
• Frequency: Daily
• Duration: 6-12 months minimum for visible results
• Route: Oral capsule

Reported Benefits

• Superior DHT suppression vs finasteride
• Hair regrowth and thickening
• Reduced hair miniaturization
• Prostate volume reduction
• Effective for diffuse thinning

Potential Side Effects

• Sexual side effects (5-7%)
• Decreased libido
• Gynecomastia (rare)
• Depression (rare)
• Post-finasteride syndrome (controversial)

Research Citations

1. Dutasteride vs finasteride for AGA (2022) - Dutasteride 0.5mg produced 12% greater hair count improvement than finasteride 1mg at 24 weeks in vertex AGA (Phase III).
2. Long-term dutasteride safety for hair loss (2021) - 5-year follow-up showed sustained hair maintenance in 90% of patients with sexual side effects occurring in <5% and resolving on discontinuation.

Related Hair Growth Compounds

• Finasteride - Full Profile
• RU-58841 - Full Profile
• Minoxidil - Full Profile
• GHK-Cu Topical - Full Profile
• TB-4 Topical (Hair) - Full Profile
• AHK-Cu - Full Profile

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