How effective is finasteride treatment for male pattern hair loss?

Male pattern hair loss is influenced by sensitivity to a hormone by-product that gradually miniaturises susceptible follicles. Finasteride reduces formation of that by-product, which may slow shedding and help some miniaturised hairs become more substantial. It does not revive every inactive follicle or replace a diagnosis. Hair changes are gradual, and photographs taken in consistent lighting can help a clinician judge progress more reliably than day-to-day shedding.

Have the pattern of loss assessed before starting, especially if shedding is sudden, patchy, painful, or associated with scalp inflammation. Take the prescribed form as directed and do not change the dose without advice. Tell the clinician about medicines, liver problems, mood symptoms, sexual symptoms, fertility plans, and any partner who is pregnant or could become pregnant. Keep follow-up appointments to review response and tolerability.

Contact your prescriber if you develop troublesome sexual symptoms, breast changes, depressed mood, anxiety, or an allergic reaction. Seek urgent help for facial or throat swelling or breathing difficulty. Rapid loss, scalp scaling, or bald patches also warrants reassessment because another condition may be contributing.

Ask whether your hair pattern fits androgenetic alopecia, how progress will be documented, and when a fair review is appropriate. Ask about reproductive precautions, possible side effects, interactions, and what alternatives could be considered if finasteride is unsuitable or insufficient.