learn Spironolactone
Blood-pressure and diuretic drug with anti-androgen effects
- How does spironolactone help reduce hair loss when used in topical or oral treatments? Spironolactone is thought to slow androgen-driven follicle miniaturisation by blocking androgen receptors; the trials are small, mostly in women and mostly alongside minoxidil. It is a prescription drug and its use for hair loss is off-label.
- Is spironolactone better for hair regrowth as a pill or as a scalp solution? Oral spironolactone has the stronger published evidence for hair regrowth; topical versions cause fewer systemic side effects but have been studied far less, and no trial has compared the two head to head.
- Who is spironolactone used for in androgen-related hair thinning, and who should avoid it? Studies of spironolactone for hair loss are mostly in adult women; its use is off-label, it is avoided in pregnancy and generally not used in men, and the US label advises potassium checks (DailyMed, Aldactone).
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