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Spironolactone for PCOS: Acne, Hair and What to Know

2026-09-28

Short answer: Spironolactone is a blood pressure and fluid medicine that acts against androgens, which is why it turns up in PCOS care for unwanted hair growth. The 2023 International Evidence-based Guideline treats it as a second step: an anti-androgen may be considered for hirsutism when the pill plus cosmetic hair treatment has not done enough after six months or more. Effective contraception is required throughout, because anti-androgens can harm a male fetus.

What spironolactone actually is

Spironolactone is in a class of medications called aldosterone receptor antagonists, sold as Aldactone in tablet form and Carospir as a liquid. Its approved jobs are cardiovascular and kidney related: hyperaldosteronism (the body making too much of the hormone aldosterone), low potassium levels, heart failure, fluid retention from conditions including liver or kidney disease, and high blood pressure. It makes the kidneys pass unneeded water and sodium into the urine while holding on to potassium.

None of that is about PCOS. No medicine is approved by the FDA specifically for PCOS, so its use here is off label, as the pill and metformin are. MedlinePlus does list one use close to ours: it may also be used to treat certain female patients with abnormal facial hair.

Why it is used in PCOS

The 2023 guideline groups spironolactone with the anti-androgens, medicines chosen because they work against androgen activity. In PCOS, higher androgen activity drives the symptoms that most often send people looking for help: hirsutism, meaning coarse hair in a male pattern, and acne.

Notice what the guideline recommends first, though. For adults, combined oral contraceptive pills are the recommendation for hyperandrogenism (hirsutism, acne) and irregular cycles, with no brand or formulation preferred over another and lower ethinyl estradiol doses where possible. Birth control for PCOS covers that side. Spironolactone enters when the pill has had a fair run and the response is not good enough.

What the 2023 guideline says, and does not say

• Anti-androgens such as spironolactone may be considered for hirsutism after a suboptimal response to at least six months of the pill plus cosmetic therapy (laser, electrolysis).
• Effective contraception is required, because anti-androgens can harm a male fetus.
• The pill is the recommendation for hirsutism and acne in adults, which makes spironolactone an add-on to discuss, not the opening move.

The honest gap: that recommendation is written about hirsutism, and MedlinePlus lists facial hair rather than acne among spironolactone's other uses. It is commonly prescribed for stubborn hormonal acne, worth raising with a doctor or dermatologist, but that use sits further outside the evidence the guideline reviewed. If skin is your main complaint, look at what else moves it: PCOS acne and diet and dairy and PCOS.

What taking it usually looks like

This is description, not a prescription: your doctor decides whether it fits you, and at what dose.

It comes as a tablet and as a suspension, usually taken once or twice a day at around the same time each day. The suspension is shaken well before use and taken consistently either always with food or always without. The two forms release the medication differently and cannot be swapped, so only take the product you were prescribed. Doctors often start low and increase gradually.

On timing: MedlinePlus notes the full effect can take about two weeks or longer, though that is written about blood pressure and fluid rather than hair. For hair, the guideline's yardstick is the better guide, since it judges treatment over at least six months. Changes here are measured in months, not days. A missed dose is taken when you remember, unless your next one is nearly due, and never doubled up. Do not stop without talking to your doctor, even if things look better.

Side effects, plainly

Tell your doctor if any of these are severe or do not go away: vomiting, diarrhea, stomach pain or cramps, enlarged or painful breasts, irregular menstrual periods, vaginal bleeding after menopause, deepening of the voice, increased hair growth on parts of the body, drowsiness, tiredness, restlessness. Yes, increased hair growth is on that list even though hair is often the reason for taking it. Report it rather than puzzling over it alone.

Some side effects are serious, and for these the instruction is to call your doctor immediately: muscle weakness, pain or cramps; pain, burning, numbness or tingling in the hands or feet; inability to move arms or legs; changes in heartbeat; confusion; nausea; extreme tiredness; dry mouth, thirst, dizziness, unsteadiness, headache or other signs of dehydration; unusual bleeding or bruising; lack of energy; loss of appetite; pain in the upper right part of the stomach; yellowing of the skin or eyes; flu-like symptoms; rash; hives; itching; difficulty breathing or swallowing; vomiting blood; blood in stools; decreased urination; fainting.

There is also a warning attached to the medicine itself: spironolactone has caused tumors in laboratory animals. That is why MedlinePlus asks you to weigh risks and benefits with your doctor.

Things to tell your doctor before you start

• Any allergy to spironolactone, other medicines, or the tablet ingredients.
• If you take eplerenone (Inspra). Your doctor may tell you not to take spironolactone.
• Addison's disease, anything else that can raise blood potassium, or kidney disease. Again, they may tell you not to take it.
• Liver disease.
• Every prescription and non-prescription product you use. Potassium supplements, NSAIDs such as ibuprofen and naproxen, and acetylsalicylic acid can interact, so do not start any of them mid-treatment without asking first.
• Any surgery coming up, including dental surgery.
• Whether you drink alcohol, which here can cause dizziness, lightheadedness and fainting when you stand up quickly.

Expect lab tests while you are on it, and mention the medicine before any lab work.

Pregnancy and contraception

This is the part not to skim. The guideline requires effective contraception with anti-androgens, because they can harm a male fetus. MedlinePlus separately says to tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding, and to call if you become pregnant while taking it. If pregnancy is anywhere in your plans, near or far, say so before you start. It shapes both the choice of medicine and the timing.

Where food and daily life fit

There are no diet rules for spironolactone, and Peach is not going to invent any. Two points from MedlinePlus are worth carrying into your kitchen: avoid potassium-containing salt substitutes while you are on it, and ask your doctor how much of the potassium-rich foods (bananas, prunes, raisins, orange juice) fits your situation, because this medicine reduces the potassium your body loses. Follow your doctor's guidance on salt and activity.

Beyond that, food does its usual quiet work. A medicine can act on androgens without touching how steady your energy feels through the afternoon, and that still responds to what and when you eat. That is the space Peach works in: noticing patterns across your cycle and bringing something concrete to your next appointment. For the supplement most often raised for unwanted hair, spearmint and PCOS goes through the evidence.

Questions to ask your doctor

• Are we treating hair, skin, or both, and how will we judge whether it worked?
• Have I had a fair trial of the pill plus cosmetic therapy first, as the guideline suggests?
• Should I take this alongside the pill, or instead of it?
• What contraception do you consider effective here, and for how long?
• Which of my medicines and supplements interact, including painkillers I buy myself?
• Which lab tests will you run, how often, and what would make us stop?
• Given the animal tumor warning, how do you weigh risk and benefit in my case?

FAQ

Is spironolactone good for PCOS?

For hirsutism it has a defined place: the guideline says an anti-androgen may be considered once at least six months of the pill plus cosmetic therapy has given a suboptimal response. It is not the first thing to reach for, it is not approved for PCOS, and it comes with a firm contraception requirement. Whether it suits you depends on which symptom you are treating and what you have already tried.

How long until I see a difference in my hair or skin?

MedlinePlus notes the full effect can take about two weeks or longer, though that is written about blood pressure and fluid. For hair, use the guideline's timescale: it assesses treatment over six months or more. Plan for a slow read, and for keeping cosmetic hair treatment going rather than dropping it.

Can I take ibuprofen while I am on it?

Ask first. NSAIDs such as ibuprofen and naproxen, plus acetylsalicylic acid and potassium supplements, are listed as non-prescription products that may interact with spironolactone. MedlinePlus is explicit: do not start any of them mid-treatment without talking to your doctor or pharmacist.

Sources

• 2023 International Evidence-based Guideline for PCOS: https://www.monash.edu/__data/assets/pdf_file/0003/3379521/Evidence-Based-Guidelines-2023.pdf
• Teede et al. 2023, Human Reproduction: https://academic.oup.com/humrep/article/38/9/1655/7241786
• MedlinePlus, US National Library of Medicine, Spironolactone: https://medlineplus.gov/druginfo/meds/a682627.html

Educational only, not medical advice. Talk to your doctor before starting, changing or stopping any medicine.