What is the difference between Metformin ER and regular Metformin?

Metformin ER (extended-release) and metformin IR (immediate-release) are utilized in the treatment of Polycystic Ovary Syndrome (PCOS) to manage insulin resistance, a common condition associated with PCOS. Metformin ER is designed to release the medication gradually in your body, reducing the risk of gastrointestinal side effects commonly associated with the immediate-release form of Metformin. This slower release also means it can be taken less frequently which can improve adherence to the medication regimen.