Two new studies find Bayer's contraceptives Yaz and Yasmin have an increased risk of blood clots

26 April 2011

According to two new studies published in the on-line edition of the British Medical Journal, German drugs and chemicals major Bayer's (BAY: DE) contraceptive pills Yaz (3mg drospirenone/0.02mg ethinyl estradiol) and Yasmin, (3mg drospirenone/0.03mg ethinyl estradiol) carry up to triple the risk of venous thromboembolism (blood clots) over traditional pills containing the progestin levonorgestrel (LNG).

The findings of the new studies provide additional evidence that the older oral contraceptives "appear to be a safer choice with regard to venous thromboembolism than preparations containing drospirenone," says Susan Jick of Boston University's School of Medicine, who led the research team.

Study results

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