The FDA has approved combination birth control pills drospirenone and ethinyl estradiol (Yaz) and drospirenone, ethinyl estradiol, and levomefolic acid (Beyaz) to treat a more serious form of PMS called premenstrual dysphoric disorder.
AgaIn, per WebMD, “To keep your body from an actual pregnancy, these pills copy what your body would do if you were pregnant. When you conceive, your body releases different levels of estrogen and progesterone. This happens in a similar way when you give your body these hormones through the birth control pill.
Estrogen and progestin will stop or slow down ovulation (when your ovary releases an egg). They’ll also make the mucus in your cervix thicker to stop sperm, and cause the lining of your uterus to thin so a fertilized egg is less likely to implant. All of these things will help to keep you from an unplanned pregnancy.”