Birth-control-could-raise-the-risk-of-blood-clotsConsumer safety advocates have believed for quite some time that the popular birth-control pills Yaz and Yasmin, which contain the synthetic hormone drospirenone, can cause heart attacks, strokes and gallbladder failure.

Recently, the manufacturer of the pills settled about 70 lawsuits that raised such claims – out of more than 11,000 that have been filed.

Now, the U.S. Food and Drug Administration has announced another potentially hazardous side effect: blood clots.

According to the FDA, some recent studies have indicated that taking Yaz or Yasmin triples a patient’s risk of developing blood clots. The FDA is now requiring all makers of birth-control pills containing drospirenone to include information about these studies on their warning labels.

Meanwhile, other methods of birth control have also been associated with blood clots, according to a study in the British Medical Journal.

The study reported that women who use birth control patches such as Ortho-Evra or contraceptive vaginal rings such as NuvaRing increase the risk of blood clots by 7.9 and 6.5 times, respectively.

Hundreds of lawsuits have also been filed against the manufacturers of these products, claiming harm from blood clots.