Finasteride at 1mg daily is the most effective medication for androgenetic alopecia, halting further hair loss in 80 to 90% of men who take it. Combined with minoxidil, it forms the standard medical treatment protocol recommended by dermatologists worldwide. This guide covers every medication option available in 2026, from FDA-approved treatments to emerging therapies, so you can make an informed decision with your doctor.
This article is for informational purposes only and does not constitute medical advice.
DHT Blockers (5-Alpha Reductase Inhibitors)
DHT blockers address the root hormonal cause of androgenetic alopecia. Dihydrotestosterone (DHT) binds to receptors in genetically susceptible hair follicles, causing them to shrink over successive growth cycles until they produce only invisible vellus hairs.
Finasteride (Oral, 1mg)
Finasteride is the gold standard medication for androgenetic alopecia. It selectively inhibits type II 5-alpha reductase, the enzyme that converts testosterone to DHT. At 1mg daily, it reduces serum DHT by approximately 70%.
Effectiveness: 80 to 90% halt further loss; 65% experience measurable regrowth. Results begin at 3 to 6 months, with peak improvement at 12 to 24 months.
Cost: $10 to $30 per month (generic). Brand-name Propecia costs $70 to $90 per month.
Side effects: 2 to 4% of users report decreased libido, erectile changes, or reduced ejaculate volume. These effects are reversible upon discontinuation in the overwhelming majority of cases.
Dutasteride (Oral, 0.5mg)
Dutasteride inhibits both type I and type II 5-alpha reductase, reducing serum DHT by over 90%. It is FDA-approved for benign prostatic hyperplasia (BPH) but widely prescribed off-label for androgenetic alopecia.
Effectiveness: Studies show slightly superior hair count improvements compared to finasteride, particularly at the vertex. A landmark comparison trial found dutasteride produced higher total hair counts at 24 weeks.
Cost: $15 to $50 per month (generic).
Side effects: Similar to finasteride. Dutasteride has a longer half-life (5 weeks vs. 6 to 8 hours), meaning side effects may take longer to resolve after stopping.
Topical Finasteride
Compounded topical finasteride (0.1% to 0.25%) delivers the drug directly to the scalp. The rationale is achieving high local DHT suppression while reducing systemic absorption and its associated side effects.
Effectiveness: Preliminary clinical data suggests comparable scalp DHT reduction to oral finasteride with 50 to 75% less systemic DHT suppression. Larger, long-term trials are still in progress.
Cost: $40 to $80 per month through compounding pharmacies or telehealth services.
Side effects: Potentially lower than oral finasteride based on reduced systemic absorption, though head-to-head data is limited.
Growth Stimulators
Growth stimulators do not address DHT but directly promote hair follicle activity. They work best when combined with a DHT blocker.
Topical Minoxidil (5%)
Minoxidil extends the anagen phase of the hair cycle and improves follicular blood flow. The 5% concentration is standard for men, applied twice daily as liquid or foam.
Effectiveness: 40 to 60% of men experience visible regrowth. Effects appear at 4 to 6 months of consistent use.
Cost: $10 to $25 per month (over the counter).
Side effects: Scalp irritation, unwanted facial hair growth (especially with liquid formulation), and initial shedding in the first 2 to 4 weeks.
Oral Minoxidil (Low Dose)
Low-dose oral minoxidil (1.25 to 5mg daily) is increasingly prescribed by dermatologists as an off-label alternative to topical application. It eliminates the compliance challenges of twice-daily topical use.
Effectiveness: Emerging evidence suggests comparable or slightly superior results to topical minoxidil. Some dermatologists report better patient outcomes due to improved adherence.
Cost: $5 to $15 per month (generic).
Side effects: Potential for body-wide hypertrichosis (increased hair growth everywhere), fluid retention, and cardiovascular effects. Requires baseline ECG and blood pressure monitoring. Not appropriate for patients with cardiac conditions.
Anti-Androgen Topicals
Ketoconazole Shampoo (2%)
Ketoconazole has mild anti-androgenic properties and reduces scalp inflammation. Used 2 to 3 times per week, it complements finasteride and minoxidil as the third component of the "big three" protocol.
Cost: $8 to $20 per bottle.
Emerging Topical Anti-Androgens
Pyrilutamide is a topical androgen receptor antagonist currently in Phase III clinical trials in China. It blocks DHT from binding to follicle receptors without affecting systemic hormone levels. Clascoterone, FDA-approved for acne, is being studied for androgenetic alopecia at higher concentrations.
Neither is yet available for hair loss in most markets as of 2026.
Combination Protocols
The Standard Triple Therapy
The most widely recommended medical protocol combines finasteride (oral, 1mg daily), minoxidil (topical 5%, twice daily), and ketoconazole shampoo (2%, 2 to 3 times weekly). This approach targets DHT, stimulates growth, and reduces scalp inflammation simultaneously.
Enhanced Protocol
For patients seeking maximum medical intervention before considering surgery, some dermatologists prescribe dutasteride instead of finasteride, oral minoxidil instead of topical, and monthly microneedling sessions to boost topical absorption and trigger growth factor release.
Choosing the Right Medication
Your Norwood scale stage influences which medications are appropriate. Early stages (Norwood 2 to 3) often respond well to finasteride alone. Moderate stages (Norwood 3 to 4) benefit from combination therapy. Advanced stages (Norwood 5 and above) require medication to stabilize remaining hair, with surgical restoration addressing the areas medication cannot recover.
All medications require ongoing use to maintain results. Stopping treatment allows DHT-driven miniaturization to resume.
Find out which treatment protocol matches your hair loss pattern with a free AI analysis at myhairline.ai/analyze.