The safety of Bayer’s two blockbuster oral contraceptives, Yaz and Yasmin, have been called into question. These drugs which were the first to contain a progestin known as drospirenone, which is now used in a number of generic versions of the pills.
Yaz and Yasmin have been implicated in the formation of blood clots, a condition known as venous thrombo-embolism (VTE). The FDA recently found that Yaz and Yasmin side effects increased the risk of blood clots 74% when compared to older birth control pills that use levonorgestrel as a progestin instead of drospirenone. A number of other independent studies have shown an increased risk of blood clots from Yaz and Yasmin as well.
Newly unsealed documents, revealed during discovery in thousands of Yaz and Yasmin lawsuits being pursued against Bayer, indicate that experts believe that the company kept important safety data from federal regulators. Ex FDA Chief, Kessler gave expert opinion testimony that Bayer purposefully mislead the FDA about Yaz and Yasmin’s safety by selectively presenting data on blood clots and other thromboembolic events to make the drugs appear to be safer than they really were.