How Fast Does Finasteride Work? A Month-by-Month Timeline
Finasteride starts working within 24 hours—but you won't see that in the mirror for months. Here's exactly what to expect at each stage, so you don't give up too soon.
The Short Answer
- Day 1: DHT levels drop ~65%
- Month 1-3: No visible change (internal work happening)
- Month 3-6: Shedding slows; first visible signs
- Month 6-12: Noticeable improvement
- Year 1+: Peak results
Why It Takes So Long to See Results
Finasteride works immediately at the hormonal level—but hair growth is slow. Here's why:
- 1. Finasteride blocks DHT production within hours
- 2. Shrunken follicles need time to recover
- 3. Hair grows only ~0.5 inches per month
- 4. New hairs must reach visible length
- 5. Hair cycles through growth phases (anagen/telogen)
Think of it like planting seeds: the fertilizer works immediately, but you won't see sprouts for weeks.
Detailed Timeline: Month by Month
Week 1: The Invisible Start
What's happening: Within 24 hours, finasteride reduces DHT levels by about 65%. By day 3, the drug reaches consistent levels in your blood.
What you'll see: Nothing. Absolutely nothing visible yet.
Month 1: Patience Required
What's happening: DHT is suppressed ~70%. Hair follicles are beginning to recover from years of miniaturization damage.
What you'll see: Still nothing visible. Some men notice slightly increased shedding—this is actually normal as weak hairs make way for stronger ones.
Don't panic: Initial shedding doesn't mean it's not working!
Months 2-3: First Hints
What's happening: Dormant follicles are reactivating. New hairs are beginning to grow beneath the skin's surface.
What you'll see: By month 3, some men notice less hair in the shower drain or on their pillow. Shedding slows. Hair may feel slightly thicker. One study found "significant improvement" at the 12-week mark.
Good sign: If shedding has decreased, finasteride is working.
Months 4-6: Visible Progress
What's happening: New hairs are long enough to see. Vellus hairs (fine, light) are converting to terminal hairs (thick, pigmented).
What you'll see: Most men notice visible improvement around this stage. Thinning areas look fuller. Hairline may appear denser. Studies show 92% of men see improvement by month 4.
This is the turning point: If you're going to respond to finasteride, you'll likely see it now.
Months 6-12: Real Results
What's happening: Hair follicles have fully recovered. Multiple growth cycles have completed. Maximum follicle activation.
What you'll see: Significant, noticeable improvement. Clinical trials show 65% of men experience visible regrowth at 12 months. Hair count increases measurably. Others comment on your hair.
Peak effectiveness: Most men reach maximum benefit around month 12.
Year 2 and Beyond: Maintenance + Bonus Gains
What's happening: Continued protection from DHT. Some men see ongoing incremental improvement.
What you'll see: Studies show 21% of men continue improving beyond 5 years. Hair quality often better at year 2 than year 1. Long-term studies show 80%+ maintain results for 5+ years.
What If You Don't See Results?
Give it time. But if you see no improvement after 12 months:
- •Finasteride may not work for you (~10% of men don't respond)
- •Your hair loss may not be DHT-driven (other causes exist)
- •Consider adding minoxidil for combination therapy
- •Talk to a dermatologist about alternatives (dutasteride, hair transplant)
💡 Important: It May Still Be Working
Even if you don't see regrowth, finasteride may be preventing further loss. Compare photos from 12 months ago—if your hair looks the same, that's actually success. Without treatment, you'd have less hair.
Ready to Start Finasteride?
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How to Maximize Your Results
- 1. Take it consistently — Same time every day. Skipping doses reduces effectiveness.
- 2. Take progress photos — Monthly, same lighting. You won't notice gradual change otherwise.
- 3. Add minoxidil — Combination therapy is 50% more effective than either alone.
- 4. Be patient — 12 months minimum before judging results.
- 5. Start early — Works better on existing follicles than bald areas.
Key Takeaways
- ✓Finasteride works within 24 hours (internally)
- ✓Visible results take 3-6 months minimum
- ✓Peak results at 12 months
- ✓Initial shedding is normal—don't quit
- ✓Must continue taking it to maintain results
Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Individual results vary. Consult a healthcare provider before starting finasteride.