This acne drug is having a moment. Here is what the science says about spironolactone

The drug spironolactone was approved as a diuretic in 1960, designed to make the kidneys excrete sodium. In recent years, however, it has become a go-to acne treatment for many patients. Dermatologists report patients arrive asking for spironolactone by name, the way they once arrived asking about the acne drug isotretinoin, formerly known by the brand name Accutane: New York dermatologist Carmen Castilla told The Cut that women frequently ask for the medication after hearing about it from their friends.

Spironolactone has also been making the rounds on social media with one user reporting it to be a “magical life-changing pill.” While the usual script for a TikTok drug trend ends with a doctor sighing and explaining that the evidence is thin, there is evidence for spironolactone’s effectiveness. As Honeydew reports, it is the rare wellness phenomenon that gets more credible the closer you look.

For about 40 years, spironolactone for acne ran on clinical folklore. Dermatologists in the 1980s noticed that women taking it for blood pressure stopped breaking out. The drug blocks androgen receptors, dialing down the testosterone signaling that drives oil production. An off-label tradition was born. Doctors swore by it. Patients loved it. Nobody had run a serious trial, which is why national acne guidelines neglected spironolactone entirely.

Then, in 2023, somebody finally ran the trial. SAFA — Spironolactone for Adult Female Acne — randomized 410 women with persistent acne across 10 U.K. centers to spironolactone or placebo, double-blind, and published the results in the journal BMJ. Women on spironolactone reported significantly clearer skin than women on placebo, the gap widening between week 12 and week 24, with side effects barely distinguishable from the sugar pill. A few more headaches, a little more lightheadedness. A year out, the spironolactone group was less than half as likely to be taking oral antibiotics.

A French trial published the following year went further and put spironolactone head-to-head against the acne drug doxycycline in adult women. In a Mayo Clinic review of 395 women, two-thirds cleared completely and 85% cleared by at least half. By 2024, the American Academy of Dermatology had folded the drug into its official acne guidelines and dropped the requirement for routine potassium monitoring in healthy young women.

A lot of adult female acne is hormonal signaling showing up on the face. Androgens tell sebaceous glands to produce more oil. More oil means more clogged pores, more inflammation, and the familiar monthly betrayal along the chin and jawline.

Spironolactone sits in the androgen receptor like a key broken off in a lock, making the skin less responsive to the hormonal signal that keeps telling it to keep producing oil.

That is why the patient profile matters. Spironolactone is most compelling when the acne looks and behaves hormonally: adult onset, lower face, cyclical flares, worse before a period, persistent despite topicals, often accompanied by the particular exhaustion of having done everything “right” and still waking up with the same constellation of angry bumps.

For that patient profile, the appeal is obvious. Spironolactone targets hormonal acne at the root. It doesn't require monthly blood draws, pregnancy tests, and iPledge compliance like isotretinoin does. It works quietly in the background and delivers results with minimal side effects.

The tradeoff with spironolactone is that it is a maintenance drug, meaning it is not a cure. Nonetheless, medicine is full of maintenance drugs, meaning one has to take them continuously to reap the benefits: e.g., birth control, blood pressure medication, and SSRIs.

Spironolactone does not usually change the underlying tendency toward hormonal acne. It suppresses one of the signals that drives it. While the signal is blocked, the acne often stays quiet. Stop blocking the signal, and the old biology can come back online, sometimes within weeks.

For many women, that tradeoff is perfectly reasonable. Clear skin with one daily pill is not a consolation prize but a desired outcome. If someone has hormonal acne, tolerates the medication, has no contraindications, and does not mind staying on it, spironolactone may be exactly the right answer.

The appeal of spironolactone is often also contrasted with a negative view of isotretinoin — and not isotretinoin as it is increasingly prescribed now, but rather against isotretinoin’s reputation for not being user friendly.

Traditional isotretinoin protocols front-loaded the drug on the assumption that high daily doses produced better cures. For many patients, the results were extraordinary. The experience, less so.

But dermatology’s understanding of dosing isotretinoin — the generic version of Accutane that quietly replaced the brand name drug after it left the market in 2009 — has been changing. In 2024, a JAMA Dermatology analysis of nearly 20,000 patients, led by Harvard dermatologist John Barbieri, challenged the old assumption that higher daily doses were the key to lasting remission. What predicted durability was the cumulative dose — the total amount delivered over the whole course — not how much you take each day. Reach the target slowly, at 20 milligrams a day over a longer period, and the odds of staying clear can resemble the patient who took 60 milligrams a day for five months. The bonus is often a lower side effect profile.

That does not make isotretinoin casual. It still requires monitoring, strict pregnancy precautions, and a willingness to tolerate mild side effects. But it does mean the old paradigm — gentle spironolactone versus brutal isotretinoin — is less true than it used to be.

In fact, spironolactone and isotretinoin are not competing for the same job.

If your acne is mild-to-moderate, hormonally patterned, and responsive to androgen blocking, spironolactone may be the cleanest answer. If your acne is severe, scarring, less hormonally patterned, or you are unwilling to be on an open-ended medication, isotretinoin may deserve a serious look.

The best acne drug is the one that works best for you — ideally after a real conversation with a dermatologist who knows your skin, your history, and your tolerance for trade-offs.

This story was produced by Honeydew and reviewed and distributed by Stacker.