Drospirenone 3 mg / ethinyl estradiol 0.02yaz is used for:preventing pregnancy. it is also used to treat premenstrual dysphoric disorder (pmdd) or certain types of acne in women who are using yaz for birth control. it may also be used for other conditions as determined by your doctor.yaz is a progesterone and estrogen combination birth control pill. it works by preventing ovulation, thickening the mucus in the cervix, and changing the lining of the uterus.