Metformin

Metformin is a medication used for type 2 diabetes but it is also regularly prescribed "off-label" to treat PCOS and its symptoms. Because many women with PCOS have insulin resistance, Metformin can encourage regular menstrual cycles, stimulate ovulation and lower the risk of miscarriage.

Prescribing "off-label" means to prescribe a drug for something not covered by the product license. It doesn't mean that the drug is unsafe or unfit for purpose - just that the drug manufacturer has not extended the license to cover the additional use(s).