Oral spironolactone is a prescription medication that helps address hormone-related hair thinning by blocking the effects of androgens—hormones that can shrink hair follicles and shorten the growth cycle. By reducing androgen activity, spironolactone can slow ongoing shedding, protect vulnerable follicles, and promote healthier, fuller hair growth over time.
It is most commonly used for women with androgen-driven hair loss or PCOS-related shedding, particularly when topical treatments alone aren’t enough. Results typically develop gradually over several weeks to months, with continued improvement as the hair growth cycle resets. Many people notice reduced shedding, stronger regrowth, and better overall density when used consistently and monitored by a licensed clinician.

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