Spironolactone for hair loss: a tablet for female pattern thinning
Spironolactone is an FDA-approved generic tablet for heart failure, high blood pressure and fluid buildup. Physicians prescribe it off-label for female pattern hair loss because it blocks the effects of androgens, the hormones behind pattern thinning. It is for women only and is never used in pregnancy. It can raise potassium. A US-licensed physician decides whether it fits you, asking about pregnancy first.
FDA-approved generic, off-label for hair lossOral tablet · Women
As low as $46/mo, billed $549 yearly · Free online assessment · Physician-reviewed · A prescription is not guaranteed
No lab tests are required. No scalp photos: the intake is a set of questions. A follow-up visit once a year, every 12 months.
Care is provided by Beluga Health, P.A., a physician group licensed in all 50 states and DC.
Who it may be for
- Women with female pattern hair loss: a widening part or thinning across the top of the head.
- Women who are not pregnant, not trying to conceive and not breastfeeding.
- Women willing to give it 6 to 12 months before judging it.
Only your physician can decide whether it is appropriate. A prescription is not guaranteed.
Who it is not for
- Anyone who is pregnant or trying to conceive: its label says to avoid it in pregnancy because it feminized male fetuses in animal studies.[1]
- Anyone with high potassium or Addison’s disease, or who takes eplerenone: the label rules it out.[1]
- People with kidney problems, or who take potassium supplements, salt substitutes, or blood pressure medicines that raise potassium (ACE inhibitors or ARBs), should say so first.[1]
- Men: it is not offered for male pattern hair loss here, and it can cause breast enlargement in men.[1]
How it works
Spironolactone blocks aldosterone, which is why it is used for blood pressure and fluid, and it also has anti-androgen effects. In female pattern hair loss, androgens shrink hair follicles over time; physicians use spironolactone to counter that effect.[1][2][3]
How long it takes
The American Academy of Dermatology says prescription pills for female pattern hair loss are taken for 6 to 12 months before you know whether they work, and that no growth within 12 months means the medicine will not work for you.[4]
What one study found
In an open study of 80 women with female pattern hair loss treated with spironolactone or cyproterone acetate, another anti-androgen, 44% had some regrowth, 44% stayed the same and 12% kept losing hair. There was no placebo group, and the two medicines were reported together.[2]
Side effects and safety
- High potassium (hyperkalemia): its label says to check potassium within a week of starting or changing the dose, and regularly after. The risk is higher with kidney problems or other potassium-raising medicines.[1]
- Other side effects listed on its label include irregular periods or no periods, bleeding after menopause, breast or nipple pain, dizziness, headache, drowsiness, low blood pressure and dehydration.[1]
- Pregnancy: in animal studies spironolactone feminized male fetuses, and its label says to avoid it in pregnancy. Tell your physician right away if you become pregnant.[1]
Get medical care right away for chest pain, shortness of breath, fainting, or sudden swelling of your face, hands or feet. Report a side effect to FDA MedWatch.
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A private online intake from home. A US-licensed physician reviews it and decides what, if anything, fits you.
Start your free assessmentCommon questions
Is spironolactone FDA-approved for hair loss?
No. It is FDA-approved for heart failure, high blood pressure, fluid buildup and primary hyperaldosteronism. Physicians prescribe it for female pattern hair loss off-label.
Why is spironolactone used for female hair loss?
It has anti-androgen effects. Androgens shrink hair follicles in pattern hair loss, and spironolactone is used to counter that.
Can I take spironolactone if I want to get pregnant?
No. Its label says to avoid it in pregnancy, because it feminized male fetuses in animal studies. We do not suggest it to anyone who is pregnant, trying to conceive or breastfeeding.
Do I need blood tests on spironolactone?
Its label says to check potassium within a week of starting or changing the dose, and regularly after. Your physician tells you what is needed for you.
How long does spironolactone take to work for hair?
The American Academy of Dermatology says 6 to 12 months before you know whether it works, and no growth within 12 months means it will not work for you.
Can men take spironolactone for hair loss?
It is not offered for men here. In men it can cause breast enlargement; men have finasteride and oral minoxidil as options.
Can I get spironolactone online?
Yes, with VevaMD: you answer a private intake that asks about pregnancy first, and a US-licensed physician from Beluga Health, P.A. decides whether spironolactone fits you.
Sources
- Aldactone® (spironolactone) tablets, prescribing information. Pfizer. DailyMed. Checked October 23, 2026.
- Sinclair R, et al. Treatment of female pattern hair loss with oral antiandrogens. Br J Dermatol. 2005;152(3):466-473. Checked October 23, 2026.
- MedlinePlus Genetics (NIH). Androgenetic alopecia. Checked October 23, 2026.
- American Academy of Dermatology. Female pattern hair loss: Overview. Checked October 23, 2026.
- U.S. Food and Drug Administration. MedWatch: The FDA Safety Information and Adverse Event Reporting Program. Checked October 23, 2026.
Last updated 2026-10-24. Content standards
Care is provided by Beluga Health, P.A., a physician group licensed in all 50 states and DC. Clinical care is provided by board-certified, US-licensed physicians. VevaMD Inc is a technology and marketing storefront only — not a medical provider or a pharmacy. Prescriptions are only issued if a licensed physician determines treatment is appropriate. Compounded medications are prepared by state-licensed pharmacies for individual patients. They are not FDA-approved and have not been reviewed by FDA for safety, effectiveness or quality. This page is general information, not medical advice, and does not replace a visit with your own physician. Brand names are trademarks of their owners; VevaMD is not affiliated with them. Outcomes differ from person to person.