Spironolactone

Spironolactone is an oral medication classified as an aldosterone inhibitor, originally developed to treat high blood pressure and fluid retention. In dermatology, it is prescribed off-label to address acne and other skin conditions driven by androgen sensitivity, particularly in adults and those assigned female at birth.The ingredient works systemically rather than topically, meaning it is taken by mouth and circulates through the bloodstream. It does not appear in conventional skincare products; treatment requires a prescription from a doctor or dermatologist.

Spironolactone blocks androgen receptors in skin cells and reduces androgen production in the body. Androgens (male hormones present in all bodies) stimulate sebaceous glands to produce more sebum and can trigger inflammatory changes in the pilosebaceous unit—the hair follicle and oil gland complex. By reducing androgen activity, spironolactone decreases sebum output and inflammatory signalling, which can gradually improve acne.The mechanism is particularly relevant for acne that worsens around the menstrual cycle, persists into adulthood, or occurs alongside other signs of hormonal sensiti…

Spironolactone is a prescription medication and must be initiated and monitored by a healthcare provider. Initial dosing is typically low (25–50 mg daily) and may be adjusted based on response and tolerability. Regular blood tests to monitor potassium levels and kidney function are standard practice. Results are not immediate; most people notice improvement after 2–3 months. It is often combined with topical treatments such as retinoids or benzoyl peroxide for enhanced effect.

Spironolactone is generally well-tolerated in dermatological doses but can cause side effects including dizziness, irregular periods, breast tenderness, and headache. It is not suitable for those with kidney disease or high potassium levels, and may interact with certain medications. Medical supervision is essential.