Metformin for PCOS, Explained

What metformin is

Metformin is a medication originally developed for type 2 diabetes. It helps the body use insulin more effectively and reduces how much sugar the liver releases into the blood. Because insulin resistance sits at the center of PCOS for many women, metformin became a common tool in PCOS care — even for women who do not have diabetes.

Why providers prescribe it for PCOS

By improving insulin sensitivity, metformin can help with several PCOS concerns: more regular cycles, better blood sugar control, and support for ovulation in women trying to conceive. It is often used alongside lifestyle changes — not instead of them. Think of it as one tool in the toolbox, not the whole toolbox.

Common questions women ask

• Will it help me get pregnant? It can support ovulation in some women, but it is not a fertility drug and no one can promise pregnancy from it.
• What about side effects? Stomach upset and nausea are common at first; providers usually start with a low dose and increase slowly, and an extended-release form is often gentler.
• Do I take it forever? That depends on your goals and how you respond — it is an ongoing conversation with your provider, not a life sentence.
• Does it cause low blood sugar? On its own, metformin rarely causes lows the way some diabetes drugs can — but ask your provider about your specific situation.

An important note

This page is education only — not prescribing advice. Whether metformin is right for you depends on your labs, your history, and your goals. Never start, stop, or change the dose of any prescription without talking to your provider first. Bring your questions to your visit; that is exactly what it is for.

Bring your medication list

At your visit, bring every prescription, supplement, and over-the-counter product you take — including doses. Interactions and side effects can only be judged with the full list in front of your provider. When in doubt, bring the bottles.