Yaz, manufactured by Bayer, is a daily oral contraceptive pill that prevents unwanted preganancies by changing the uterine and cervical lining in women. Some women have suffered serious, life-threatening side effects while taking Yaz, including blood clots, deep vein thrombosis, pulmonary embolism, stroke, and heart attack. When first released on the market, commercials touted Yaz as effective in treating symptoms for which it did not have FDA approval, including acne, PMS, bloating, and moodiness. Many lawsuits filed across the United States claim that Bayer overstated the contraceptive's benefits and provided inadequate warning regarding the serious risks involved with taking Yaz.