PCOS Treatments: What the Evidence Shows

Jul 7, 2026 · 5 min readRolf Hoefer, Ph.D.

5 sources reviewedMedically reviewed by Amy Bingaman, MD, MSCP, FACOGArticle updated Sep 25, 2026Our editorial process

The short answer

The best polycystic ovary syndrome (PCOS) treatment depends on the problem being treated. Metformin may be used for metabolic concerns, letrozole or clomiphene for ovulation, anti-androgens for selected androgen symptoms, and weight-management medicines for eligible patients. Comparing them in one ranked list is misleading because they serve different goals. This is a selected evidence review, not a systematic or comprehensive review of every polycystic ovary syndrome study. [1]

What you’ll learn

  • Polycystic ovary syndrome (PCOS) does not have one treatment ranking because medicines used for metabolic health, fertility, excess hair, and weight address different goals.
  • Metformin, letrozole, liraglutide, anti-androgens, and clomiphene cannot be fairly ordered by simply counting study findings.
  • Metabolic and cardiovascular screening can remain important after menopause even when fertility treatment is no longer relevant.

Bottom line

Polycystic ovary syndrome (PCOS) treatment starts with the problem that needs treatment. A medicine used to induce ovulation should not be ranked against one used for glucose control, weight management, or excess hair as if they were competing for the same job.

The earlier version of this page did exactly that. It ranked treatments by the number of findings extracted into our evidence database. That count was not comprehensive, and it mixed studies with fundamentally different goals. We have removed the ranking.

This page reviews selected evidence. It is not a systematic or comprehensive review of every polycystic ovary syndrome treatment study.

Treatment depends on the goal

Treatment depends on the goal
Main goalOptions that may be discussedImportant context
Glucose and metabolic healthMetformin, nutrition, physical activity, and other metabolic treatment when indicatedBlood glucose, cholesterol, blood pressure, kidney function, and overall cardiovascular risk matter.
Fertility and ovulationLetrozole or clomiphene in appropriate premenopausal patientsThese treatments are not an all-purpose polycystic ovary syndrome therapy and are generally not relevant after menopause.
Weight managementLifestyle support and approved weight-management medicines for eligible patientsEligibility, side effects, muscle preservation, and long-term access matter.
Excess hair or acneSelected hormonal or anti-androgen approaches, plus dermatologic treatmentPregnancy potential, blood pressure, potassium, and other medicines can change the plan.
Irregular or heavy bleeding before menopauseEndometrial protection and cycle management based on individual riskNew bleeding after menopause requires evaluation rather than routine polycystic ovary syndrome treatment.

What the selected studies found

A 2023 review notes that metformin is used to manage weight and metabolic outcomes in adults with polycystic ovary syndrome and a body mass index of 25 or higher. It may also improve ovulation and live birth, but it is less effective for that purpose than clomiphene or letrozole. [1]

A small randomized trial of 74 women with polycystic ovary syndrome and infertility compared letrozole with clomiphene for ovulation induction, measuring follicle growth, estradiol levels, the uterine lining, and pregnancy rates. Its authors concluded that letrozole may be an acceptable alternative to clomiphene. [2]

A 12-week pilot trial in women with obesity and polycystic ovary syndrome found that liraglutide, a glucagon-like peptide-1 (GLP-1) medicine, reduced body weight, body mass index, and waist circumference more than metformin. The trial was small, open-label, and short. [3]

A 12-month randomized study of women with excess hair growth found that spironolactone alone reduced hirsutism, including in women with polycystic ovary syndrome. In that small polycystic ovary syndrome subgroup, hirsutism scores ended lower with cyproterone acetate combined with ethinyl estradiol than with spironolactone. [4] Cyproterone acetate is not approved in the United States.

In a randomized trial of 626 women with polycystic ovary syndrome and infertility, clomiphene led to more live births than metformin (22.5% versus 7.2%). [5]

These are different outcomes in different populations. The results can inform specific decisions, but they cannot support one overall treatment order.

What changes after menopause

Ovulation-induction treatment is no longer the focus after natural menopause, but a history of polycystic ovary syndrome can still be relevant. Diabetes, cholesterol, blood pressure, sleep apnea, and cardiovascular risk deserve attention based on current health and established screening guidance.

New facial hair, rapidly worsening acne, scalp hair loss, deepening voice, or other virilizing changes after menopause should not automatically be attributed to an old polycystic ovary syndrome diagnosis. A clinician may need to look for a new source of androgen excess.

Postmenopausal bleeding also needs prompt evaluation. It should not be managed as ordinary cycle irregularity.

Safety and practical limits

Each treatment has its own precautions. Metformin use depends partly on kidney function and gastrointestinal tolerance. Anti-androgen treatment can affect blood pressure, potassium, pregnancy risk, and medicine interactions. Weight-management medicines have separate eligibility rules and adverse effects. Fertility medicines require specialist context and do not belong in a postmenopausal treatment plan.

Important red flags include postmenopausal bleeding, rapid new facial-hair growth, a deepening voice, or other sudden virilizing changes. These symptoms need evaluation rather than being assumed to be part of a longstanding polycystic ovary syndrome history.

The evidence is limited by the different goals, populations, and outcomes represented in polycystic ovary syndrome trials. A result about ovulation cannot answer a question about cardiovascular risk or symptom treatment after menopause.

What this review includes

We retained a small set of cited studies but removed the unsupported ranking. We did not search every database, screen all eligible polycystic ovary syndrome trials, or formally grade every outcome. The page therefore explains what the reviewed studies can tell us without pretending they measure the total evidence behind each treatment.

What to ask your clinician

  • Which polycystic ovary syndrome related risk or symptom are we treating now?
  • What metabolic and cardiovascular screening do I need at my age?
  • Could new acne, hair changes, or bleeding point to something other than polycystic ovary syndrome?
  • What benefits and side effects should we track for the chosen treatment?
  • When should the plan be reassessed?

References

[1] Dong J, Rees DA. Polycystic ovary syndrome: pathophysiology and therapeutic opportunities. BMJ Med. 2023;2(1):e000548. doi:10.1136/bmjmed-2023-000548 https://pubmed.ncbi.nlm.nih.gov/37859784/

[2] Bayar U, Basaran M, Kiran S, Coskun A, Gezer S. Use of an aromatase inhibitor in patients with polycystic ovary syndrome: a prospective randomized trial. Fertil Steril. 2006;86(5):1447-51. doi:10.1016/j.fertnstert.2006.04.026 https://pubmed.ncbi.nlm.nih.gov/17070196/

[3] Jensterle M, Salamun V, Kocjan T, Vrtacnik Bokal E, Janez A. Short term monotherapy with GLP-1 receptor agonist liraglutide or PDE 4 inhibitor roflumilast is superior to metformin in weight loss in obese PCOS women: a pilot randomized study. J Ovarian Res. 2015;8:32. doi:10.1186/s13048-015-0161-3 https://pubmed.ncbi.nlm.nih.gov/26032655/

[4] Spritzer PM, Lisboa KO, Mattiello S, Lhullier F. Spironolactone as a single agent for long-term therapy of hirsute patients. Clin Endocrinol (Oxf). 2000;52(5):587-94. doi:10.1046/j.1365-2265.2000.00982.x https://pubmed.ncbi.nlm.nih.gov/10792338/

[5] Legro RS, Barnhart HX, Schlaff WD, et al. Clomiphene, metformin, or both for infertility in the polycystic ovary syndrome. N Engl J Med. 2007;356(6):551-66. doi:10.1056/nejmoa063971 https://pubmed.ncbi.nlm.nih.gov/17287476/

Common questions

What is the best treatment for PCOS?

There is no single best treatment. The plan depends on whether the priority is metabolic health, fertility, irregular bleeding, acne, excess hair, or weight management.[1][2][3][4][5]

Does metformin treat PCOS?

Metformin is used to manage weight and metabolic outcomes in adults with polycystic ovary syndrome (PCOS) and a body mass index of 25 or higher. It may also help ovulation, but it is less effective for fertility than clomiphene or letrozole. Whether it is useful depends on the person's metabolic risks and treatment goals.[1]

Are letrozole and clomiphene relevant after menopause?

These medicines are used for ovulation induction, so they are generally not relevant after natural menopause. Their presence in the earlier all-purpose ranking showed why unlike treatment goals should not have been combined.[2][5]

Why was the earlier ranking removed?

It counted extracted findings from a limited evidence set and mixed treatments intended for very different outcomes. It did not measure the complete polycystic ovary syndrome (PCOS) evidence base.[1][2][3][4][5]

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