Does Spironolactone Cause Skin Thinning or Facial Volume Loss?

No study shows that oral spironolactone causes facial volume loss or speeds up skin thinning. In a study that measured skin structure, 25 women taking 25 to 50 mg a day for acne kept a stable skin barrier, and their skin became firmer and more elastic by 4 to 6 months. That study was small and short, and no research has measured facial volume in women over 35 on spironolactone. Tracking your own face with your clinical team is how you close that gap.

What happened to skin firmness in women taking spironolactone?

Their skin got firmer and bouncier, and nothing that protects the skin got worse. Researchers followed 25 women taking oral spironolactone for acne for 6 months at 25 to 50 mg a day. They measured skin on the face, chest and inner arm at the start and again at 2, 4 and 6 months.

The authors concluded that spironolactone did not harm the skin barrier and that the skin's firmness and bounce improved at 4 to 6 months.

Read the face result with one caveat. The women were also prescribed face creams, and the most common was a topical retinoid (adapalene) with benzoyl peroxide. The authors say topical retinoids are well documented to thicken skin, so part of the facial firming may come from the cream. But elasticity also improved on the chest and inner arm, where no face cream went.

Why do people think spironolactone thins your skin?

The worry comes from mixed lab findings, not from studies of women's faces. The authors of the 6-month skin study point out that one earlier study found spironolactone reduced collagen and elastin in skin. Another found that blocking androgens (male-type hormones) may increase collagen. They say the mechanism is still unsettled.

Spironolactone is also a water pill. In an 8-year follow-up of 91 women taking it for acne, the most common side effects were a diuretic effect (peeing more) and period changes.

Losing a bit of water is not the same as losing collagen. None of this research measured facial volume. If your face looks different, tell your clinical team rather than assuming the worst.

No study in this research looked at facial volume in women over 35 on spironolactone. The 6-month skin study comes closest, and it did not report ages in a way that tells us about women past 35.

Is it safe to take spironolactone for years after 35?

Long-term follow-up has been reassuring. In the 8-year follow-up, the 91 women stayed on spironolactone for an average of 28.5 months, and no serious illness was blamed on the drug. Side effects were common (59%), and 15% of the women stopped because of them.

A larger group did well too. Among 403 adult women treated at one academic center, 75.5% had less acne or fully clear skin on the face at their first follow-up. On average the women stayed on it for about 470 days. Period side effects were less common in women who also took a combined birth control pill.

Spironolactone's FDA label covers heart failure, high blood pressure, fluid buildup and a hormone condition called primary hyperaldosteronism. It does not cover acne or hair loss, so using it for skin or hair is off-label. The skin side effects on the label are severe rashes, itching and hair loss. Skin thinning is not on that list.

The label also has rules worth knowing before you start:

• Don't use it in pregnancy, because it may affect a male baby's development.
• Avoid potassium supplements and high-potassium foods, including salt substitutes.
• Get your potassium checked within a week of starting and regularly after that.

According to a review of spironolactone for adult acne, it is best avoided if your kidneys don't work well. It should also not be combined with ACE inhibitors (a common blood pressure medicine), because both raise the risk of high potassium.

Does a higher dose for hair loss change the risk?

Nobody knows yet, because skin structure hasn't been measured at hair-loss doses. Hair loss usually needs more spironolactone than acne does. A systematic review found it worked poorly for female pattern hair loss below 100 mg. The clearer gains came after at least 12 months at 100 to 200 mg a day, and the usual approach starts at 50 mg and works up to 100 to 200 mg.

The skin firmness study only covered 25 to 50 mg for 6 months. Skin structure at hair-loss doses over years is the real unknown. That is a gap in the research, not proof of harm.

Most side effects rise with dose. In the acne review, up to 18% of women on 50 to 100 mg reported period changes, compared with 70% on 200 mg. Breast tenderness went from 5% on the lower dose to 30% on 200 mg.

The women posting about higher doses in hair-loss forums talked about their hair, not their faces. One woman taking 100 mg with oral minoxidil wrote, "I feel like you can at least see that the hair quality got better a bit," and added, "I feel better mentally."

What should you do if your face looks thinner on spironolactone?

• Take photos in the same spot and the same light every month. Lighting changes how skin looks. One woman tracking her hair wrote, "I tried to do the same shots but the lightning in my new apartment is different," which made her before-and-after harder to read.
• Bring the photos to your clinical team before changing anything. Results from spironolactone are usually sustained with continued use.
• Don't stop on your own. One woman wrote that "spiro helped it clear but gave me side effects and when i came off the med, the acne came back 10x worse than before."
• If firmness is your goal, add a topical retinoid. In the 6-month study, the most common face cream prescribed alongside spironolactone contained a retinoid, and the authors note that topical retinoids are well documented to thicken skin. Tretinoin is a topical retinoid, and our clinical team can prescribe it if it fits your goal.

You want clear skin that still looks firm and full past 35. Take the quiz so your clinical team can build a skin plan around that goal, with tretinoin, GHK-Cu copper peptide or NAD+ face cream if one fits.