Dutasteride vs Minoxidil
A side-by-side research comparison of Dutasteride and Minoxidil across mechanism, dosing, half-life, benefits, side effects and research status.
Comparison table
| Attribute | Dutasteride | Minoxidil |
|---|---|---|
| Full name | Dutasteride (Avodart) | Minoxidil (Rogaine) |
| Category | Hair Growth | Hair Growth |
| Status | FDA Approved (BPH) / Off-label hair loss | FDA Approved (OTC) |
| Mechanism | 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. | Opens ATP-sensitive potassium channels in vascular smooth muscle and hair follicle cells. Increases blood flow and nutrient delivery to follicles. Prolongs anagen (growth) phase and stimulates VEGF expression for neovascularization around follicles. |
| Molecular weight | 528.53 Da | 209.25 Da |
| Half-life | ~5 weeks (extremely long) | ~4 hours (systemic); active in follicle for 22h |
| Bioavailability | ~60% oral | ~95% oral; topical: local depot effect |
| Typical dose | 0.5 mg | 5% topical (1mL 2x/day) or 2.5-5 mg oral |
| Frequency | Daily | Twice daily (topical) or once daily (oral) |
| Route | Oral capsule | Topical solution/foam or oral tablet |
Dutasteride reported benefits
- Superior DHT suppression vs finasteride
- Hair regrowth and thickening
- Reduced hair miniaturization
- Prostate volume reduction
- Effective for diffuse thinning
Minoxidil reported benefits
- Stimulates new hair growth
- Works independently of DHT pathway
- OTC availability
- Effective for both sexes
- Prolongs anagen phase
- Can combine with any other treatment
Related comparisons
Research and educational reference only. Not medical advice.