Oral Spironolactone for Female Pattern Hair Loss: 2023 Research Summary
This is a plain-language summary of the original published research. We do not add conclusions or opinions of our own. This is not medical advice — consult a certified healthcare practitioner before making any decision.
Original research published in PMC open access, 2023
Oral Spironolactone for Female Pattern Hair Loss: 2023 Research Summary
Study conclusion
This study combined results from 4 studies involving 192 women with female pattern hair loss treated with oral spironolactone. The overall hair loss improvement rate was 56.6%. Combining spironolactone with minoxidil produced a higher improvement rate (65.8%) than spironolactone alone (43.2%). The most common side effects were scalp itching and menstrual irregularities.
Strength of evidence
Who it applies to
Who was studied
Women with female pattern hair loss. 192 participants across 4 studies. Oral spironolactone, typically at doses of 100-200mg daily.
Who was NOT studied
Men — spironolactone is not used in male pattern hair loss due to risk of feminisation side effects. Women with hair loss types other than female pattern hair loss.
What to look for when shopping
Spironolactone is a prescription medication used off-label for female pattern hair loss. It is not FDA-approved for this use. It requires long-term use (typically 12 months or more) for best results. Menstrual irregularities are a common side effect and require monitoring.
What research cannot help you decide
Whether the menstrual irregularities or other side effects will affect you. Whether spironolactone alone or combined with minoxidil is right for your situation. These are questions for a prescribing doctor.
Key findings
- The overall hair loss improvement rate with spironolactone was 56.6% across the 4 included studies
- Combining spironolactone with minoxidil produced a higher improvement rate (65.8%) than spironolactone alone (43.2%)
- Scalp itching affected about 19% of women in the included studies
- Menstrual irregularities affected about 12% of women in the included studies
- Spironolactone is not FDA-approved for hair loss — it is prescribed off-label
What this study does not show
- 1.Whether spironolactone works in men. This review studied women only.
- 2.How spironolactone compares to minoxidil alone in a head-to-head controlled trial.
- 3.What happens to hair loss after stopping spironolactone.
- 4.Whether spironolactone works for hair loss types other than female pattern hair loss.
Limitations
- 1.Only 4 studies included — a very thin evidence base.
- 2.Total sample size was 192 women — small for drawing firm conclusions.
- 3.High variability across the 4 included studies.
- 4.Most evidence is observational rather than from placebo-controlled randomised trials.
- 5.Spironolactone is not FDA-approved for hair loss.
Used in these articles
Links added as fact-checks and articles citing this study are published.