Finasteride
The most effective drug against hereditary hair loss — a prescription 5-alpha-reductase inhibitor that lowers DHT. Highly effective, but with real, much-debated side effects.
⚕ Only under medical supervision
This compound is a prescription drug, or a medication with relevant risks and interactions. We deliberately do not sell it and link no source of supply. Taking it belongs in a doctor's hands — this page is for neutral information only.
Discuss benefits, risks, and dosing with your physician.
How it works
Finasteride inhibits the enzyme 5-alpha-reductase, reducing the conversion of testosterone into the more potent DHT. Because DHT miniaturises hair follicles in genetically predisposed people, finasteride slows, and can partly reverse, hereditary hair loss. The effect lasts only with continued use, and possible sexual side effects warrant consideration.
Dosage
Orally typically 1 mg/day (for hair loss). Dosing and monitoring strictly by a physician.
Considerations
Efficacy against androgenetic alopecia is well established — the debate is about side effects: sexual dysfunction, mood changes, and the (rare but documented) post-finasteride syndrome, whose symptoms persist in some people. Strongly teratogenic: women of childbearing age must not even handle broken tablets. Topical finasteride carries lower systemic exposure. Prescription only — weigh benefit and risk individually with a physician.
