Misoprostol is a medication primarily used to prevent stomach ulcers, especially in people taking nonsteroidal anti-inflammatory drugs (NSAIDs). It works by reducing the amount of acid produced in the stomach and increasing the production of protective mucus, helping to safeguard the stomach lining. Additionally, misoprostol is used in obstetrics and gynecology for various purposes, including inducing labor and managing miscarriages. It can help soften the cervix and stimulate uterine contractions, making it an important tool in reproductive health care.