Yaz is a combination birth control pill containing ethinyl estradiol and drospirenone, a synthetic progestin with anti-androgenic properties. It is used to prevent pregnancy and to treat moderate acne, premenstrual dysphoric disorder (PMDD), and symptoms of PCOS. Yaz can help regulate cycles, reduce excess hair growth, and clear hormonal acne. It carries a slightly higher risk of blood clots compared to older formulations, so patient screening is important.