Actavis to Yaz birth control after ruling. WASHINGTON. In April 2012, the FDA added information to the labels on Bayers Yaz and, as well as others, to show they may raise the risk of blood clots.. and who wish to use birth control to prevent pregnancy. may also be used for purposes not listed in this medication guide. Do not use if you are pregnant or if you have recently had a baby. You should not take if you have any of the following conditions:Some Web medicine that may not be safe to use and could put your health at risk. require a prescription from your doctor or other health care professional who is licensed in the United States to write prescriptions for medicine;