Spironolactone for Hair Loss: Benefits, Dosage and Risks

Spironolactone is one of the medical treatments you may come across when looking for medical hair loss and hair thinning treatments. The good news is that it can help some women with female pattern hair loss by slowing further thinning and improving density over time. However, it does not treat every type of hair loss. When it is suitable, spironolactone is often prescribed alongside minoxidil, a medicine that helps stimulate hair growth.

Could it be right for your hair loss? Here is who may benefit, when results usually appear and what side effects to expect.

What Is Spironolactone and How Does It Treat Hair Loss?

Yes, spironolactone can help some women with female pattern hair loss. For many, the first sign is not dramatic regrowth. It may be seeing less hair in the shower, or realising that the thinning around the parting is no longer getting worse.

A 2023 analysis brought together 4 studies involving 192 women. Overall, 56.6% experienced an improvement in their hair loss. Results appeared better when spironolactone was combined with another treatment, although the studies used different doses, combinations and ways of measuring progress. The percentage gives a useful indication that some women respond, but it cannot predict your personal result.*

*Aleissa MA. (2023). The efficacy and safety of oral spironolactone in the treatment of female pattern hair loss: a systematic review and meta-analysis.

What can a successful result look like?

You may notice:

• Less hair coming out when you wash or brush it

• Your parting stops becoming wider

• Less scalp is visible around the crown

• Finer hairs gradually look stronger or denser

Female pattern hair loss usually continues slowly without treatment. Holding on to the hair you have can therefore be a meaningful result. Some women also see better density, but spironolactone cannot restore every follicle or guarantee thicker hair.

How Long Does Spironolactone Take to Work for Hair Loss?

Hair responds slowly, so spironolactone needs a fair trial. You may notice early signs between 3 and 6 months. These can include less shedding, a parting that looks more stable or fewer areas of new thinning. Maximum results can take 6 to 12 months, particularly when you are looking for a visible change in density.

No obvious regrowth at 6 months does not always mean the treatment has failed. If shedding has slowed or your hair loss has stopped progressing, it may already be helping. Your clinician can review how consistently you have taken it, whether your diagnosis still fits and whether another cause of hair loss needs attention.

Take progress photographs every month in the same position and lighting. Comparing your parting width, scalp visibility and overall density is much more useful than checking the mirror every day.

Does spironolactone cause initial shedding?

Initial shedding is not usually linked to spironolactone itself. Minoxidil, another hair loss treatment, is often used alongside it and can cause a temporary increase in shedding during the first 4 to 6 weeks as it works to regulate the hair growth cycle and  moves hair into a new growth cycle. This usually settles as treatment continues.*

Contact your clinician if shedding is severe, keeps getting worse or comes with scalp pain, redness or sores.

*British Association of Dermatologists. (2024). Hair loss female pattern androgenetic alopecia.

What happens if you stop taking it?

Spironolactone controls female pattern hair loss rather than curing it. Any benefit usually lasts only while treatment continues. If you stop, the underlying thinning may gradually start to progress again.

Speak to your clinician before stopping a prescribed treatment. They can help you decide whether to continue, change treatment or stop based on your progress, side effects and the other medicines in your plan.

What Is Spironolactone and How Does It Work?

Spironolactone was developed to treat conditions including high blood pressure, heart failure and fluid build up. It affects how the body manages salt, water and potassium.

It also reduces some of the effects of androgens. Androgens are hormones, including testosterone and dihydrotestosterone (DHT), that are often called “male hormones”. However, women naturally produce them too, usually in smaller amounts. In some women, scalp hair follicles are particularly sensitive to these hormones.

With female pattern hair loss, sensitive follicles gradually shrink, causing the hairs they produce to become finer, shorter and less visible. By reducing the effects of androgens around the follicles, spironolactone may help slow this process.

This does not mean that you need to have high androgen levels for spironolactone to be relevant. Genetics, age and the sensitivity of your hair follicles can all play a part, and many women with female pattern hair loss have hormone levels within the usual range.

Why is spironolactone prescribed off label?

Spironolactone is licensed in the UK for heart problems, high blood pressure and fluid retention. Spironolactone is used ‘off label’ to treat women with skin and hair conditions such as acne or female pattern hair loss This means clinicians can prescribe it off label when they decide that it is a suitable option and explain the expected benefits and risks.

Which Types of Hair Loss Can Spironolactone Help?

The word hair loss covers many different conditions. Spironolactone is mainly used when gradual thinning is thought to be influenced by androgens, also known as female pattern hair loss. So getting the diagnosis right matters.

What is female pattern hair loss?

Female pattern hair loss is the most common type of hair loss in women. It is also called androgenetic alopecia and is influenced by a combination of genetics and hormones.

The hair follicles gradually become smaller, so the hairs they produce grow finer, shorter and less visible. This usually causes slow thinning over the top of the scalp, a wider central parting or more visible scalp around the crown. The front hairline often stays in place.

It can begin at any time in adulthood, although it becomes more common with age and may be more noticeable after menopause. Some women also have signs of higher androgen activity, such as irregular periods, hormonal acne or increased facial hair, but many have hormone levels within the usual range.

Female pattern hair loss usually develops over years rather than appearing suddenly. Treatment cannot cure it, but it may slow further thinning and help some follicles produce stronger, denser hair.

Spironolactone for thinning hair

Thinning hair is a symptom rather than a diagnosis. Spironolactone may be relevant when your thinning follows the gradual pattern described above. If it started suddenly or followed childbirth, illness, surgery, severe stress, rapid weight loss or a nutritional deficiency, another condition called telogen effluvium may be more likely. Spironolactone is not usually used for telogen effluvium on its own.

Spironolactone for alopecia

Alopecia simply means hair loss. Spironolactone can be considered for androgenetic alopecia, which is another name for female pattern hair loss. It does not treat every condition with alopecia in its name.

It is not a treatment for alopecia areata, which usually causes smooth, round patches or for scarring alopecia, where inflammation damages the follicles. Hair loss caused by repeated tension from tight hairstyles also needs a different approach.

Seek medical advice if your hair loss is sudden or patchy, or if you have scalp pain, burning, sores, pustules, crusting or scarring. Rapid changes such as a much deeper voice or quickly increasing facial or body hair also need further assessment.

Can it help hair loss linked to PMOS?

Polyendocrine metabolic ovarian syndrome (PMOS), previously known as polycystic ovary syndrome (PCOS), can increase androgen levels or make their effects more noticeable. If PMOS is contributing to female pattern hair loss, spironolactone may be considered as part of your treatment plan. It does not treat every aspect of PMOS, and your clinician will need to discuss contraception and any pregnancy plans before prescribing it.

Can it help hair loss during menopause?

Female pattern hair loss can become more noticeable during perimenopause or after menopause. Spironolactone may be considered, but menopause alone does not tell you whether it is the right treatment. Your hair loss pattern, medical history, blood pressure, kidney health and other medicines all matter.

Tell your clinician if you use hormone replacement therapy. HRT does not automatically rule out spironolactone, but it’s important to mention it to your clinician during your consultation.

Oral and Topical Spironolactone for Hair Loss

Most of the clinical use and evidence for spironolactone in women with female pattern hair loss relates to tablets taken by mouth. Topical spironolactone also exists, but it is much less established.

Oral Spironolactone

Oral spironolactone works throughout the body. This allows it to reduce androgen activity, but also explains why it can affect your periods, blood pressure, fluid balance and potassium levels. A clinician needs to check whether these effects make it unsuitable for you.

The evidence is still limited compared with treatments such as topical minoxidil, but oral spironolactone has been studied more extensively than topical spironolactone for female pattern hair loss.

Does topical spironolactone work for hair loss?

Topical spironolactone is applied directly to the scalp. The idea is to reduce androgen activity around the follicles while limiting the amount of medicine that reaches the rest of the body. It may sound like an easier option if you are concerned about tablets, but the research is small and results are mixed.

A 2023 review found only a handful of small studies of topical spironolactone, using different strengths and treatment combinations. The authors found promising signs, but said that larger, higher quality trials were needed.*

A 2025 study compared topical spironolactone 5%, topical finasteride 1% and topical minoxidil 5% in 45 women over 16 weeks. The spironolactone group did not show significant changes when the scalp was examined, while the finasteride and minoxidil groups did. The study was small and short, but it shows why topical spironolactone should not be treated as equivalent to an established option such as minoxidil.⁺

Topical spironolactone is not licensed for hair loss in the UK. Current British Association of Dermatologists guidance lists minoxidil, rather than spironolactone, as a topical treatment for female pattern hair loss. Topical spironolactone may be available as a specially compounded prescription through some clinicians, but its effectiveness and longer term safety are not yet clear. A topical product can also cause scalp irritation, so topical does not mean side effect free.

*Wang C, et al. (2023). The efficacy and safety of oral and topical spironolactone in androgenetic alopecia treatment: a systematic review.

⁺Mohamed El Sayed N, et al. (2025). Clinical and trichoscopic evaluations of topical finasteride 1%, topical spironolactone 5%, and minoxidil 5% in female pattern hair loss treatment.

What Dose of Spironolactone Is Used for Hair Loss?

There is no single licensed dose for female pattern hair loss. Published studies have used daily oral doses from 25 mg to 200 mg, although the dose, length of treatment and other medicines used alongside it vary considerably.*

The right dose depends on your treatment plan, health, other medicines and how well you tolerate it. Results from a study using one dose cannot tell you exactly how a different dose will work.

Some side effects, including period changes and breast tenderness, are more likely at higher doses. More is not automatically better. Take only the amount prescribed for you and do not increase or reduce it yourself.

*Aleissa MA. (2023). The efficacy and safety of oral spironolactone in the treatment of female pattern hair loss: a systematic review and meta-analysis.

How should you take spironolactone?

Take spironolactone exactly as prescribed. Take standard tablets with food or just after eating and swallow them with water. Try to take your treatment at around the same time each day. Do not change your dose unless your clinician has told you to.

Do not drastically reduce how much you drink to avoid trips to the toilet. Speak to your clinician if increased urination is disrupting your sleep or daily routine, or if you also feel dizzy or faint.

If you take spironolactone once a day and forget your dose, take it when you remember unless it is after 6pm or nearly time for your next dose. In that case, skip it and continue as normal the next day. Never take 2 doses together to make up for one you missed.

What Are the Side Effects of Spironolactone?

Many women take spironolactone without serious problems, but side effects can happen. Some relate to its effects on hormones, blood pressure and fluid balance.

Commonly reported effects include:

• Needing to urinate more often

• Dizziness or feeling light headed, especially when standing up

• Nausea or an upset stomach

• Tiredness, headaches or muscle cramps

• Breast tenderness or an increase in breast size

• Spotting, missed periods or other changes to your menstrual cycle

Some side effects are more likely at higher doses and may improve as your body gets used to treatment. Speak to your clinician if they continue, are difficult to manage or are worrying you.*

*British Association of Dermatologists. (2025). Spironolactone.

Can spironolactone cause high potassium levels?

Spironolactone can raise the potassium level in your blood. This is called hyperkalaemia. The risk is higher if you have kidney or heart problems, have previously had high potassium or take medicines that also affect potassium. Warning signs can include marked muscle weakness, unusual tiredness, numbness or an irregular heartbeat.*

Your clinician will decide whether you need kidney function or potassium blood tests based on your age, health and medicines. Monitoring is not the same for everyone.

Tell your clinician about everything you take, including blood pressure medicines, other medicines that make you urinate more, anti inflammatory painkillers such as ibuprofen, potassium supplements and herbal products. Do not use potassium supplements or potassium based salt substitutes unless a clinician recommends them.

Most people do not need to avoid ordinary foods containing potassium. Do not make major changes to foods such as bananas or avocados without individual advice. Ask your clinician or a dietitian if you have kidney problems, high potassium or take another medicine that raises potassium.

Seek urgent medical help for fainting, chest pain, significant breathlessness, a severe allergic reaction or a fast or irregular heartbeat with weakness or feeling very unwell.

For more detail, read our guide to spironolactone side effects in women.

*British Association of Dermatologists. (2025). Spironolactone.

Can You Take Spironolactone During Pregnancy or Breastfeeding?

Do not take spironolactone for hair loss if you are pregnant, as it could affect the development of an unborn baby. If you think you may be pregnant, stop taking it and contact your clinician.

Spironolactone can affect your periods and make it harder to predict when you are ovulating, but there is no evidence that it causes permanent fertility problems. If you are planning a pregnancy, speak to your clinician. When used for hair loss, UK dermatology guidance recommends waiting 1 month after stopping spironolactone before trying to conceive.

If you are breastfeeding or planning to breastfeed, speak to your clinician before using spironolactone for hair loss so they can advise whether it is suitable for you.

*British Association of Dermatologists. (2025). Spironolactone.

What Are the Alternatives to Spironolactone?

Spironolactone is not the only treatment for female pattern hair loss. Topical minoxidil is the main established treatment. Low dose oral minoxidil may also be prescribed off label when it is clinically appropriate.

Some women use minoxidil without spironolactone. Others may be offered a combination because the medicines work in different ways. If spironolactone is unsuitable, that does not mean every hair loss treatment is unsuitable.

The right option depends on the cause and pattern of your hair loss, your health, pregnancy plans, other medicines and the side effects you are comfortable managing.

Spironolactone for Hair Loss: The Bottom Line

Spironolactone can help some women slow female pattern hair loss and may improve density over time. It is most relevant for gradual, androgen influenced thinning and is often prescribed alongside minoxidil.

Give it enough time. Early signs may appear within 3 to 6 months, while maximum results can take 6 to 12 months. Because spironolactone can affect hormones, fluid balance, blood pressure and potassium, a clinician needs to check that it suits your health, medicines and pregnancy plans.

FAQs

Can spironolactone be taken with minoxidil?

Yes. Clinicians sometimes prescribe spironolactone and minoxidil together for female pattern hair loss. Spironolactone reduces androgen activity around susceptible follicles, while minoxidil stimulates hair growth. You still need to be medically suitable for both treatments.

Can I get spironolactone for hair loss on the NHS?

Spironolactone can be prescribed off label for female pattern hair loss in the UK. However, in the NHS it is typically prescribed by a consultant dermatologist or endocrinologist rather than a NHS GP alone.

Whether it is available through the NHS depends on local prescribing policies and whether a GP or specialist considers it appropriate. It is not guaranteed to be available in every area.

Is spironolactone safe to take long term?

Spironolactone has been used for many years, and many women tolerate it well. Long term suitability depends on your health, other medicines and whether you develop side effects. Attend any recommended reviews or blood tests, and tell your clinician if your health, medication or pregnancy plans change.