A U.S. Food and Drug Administration-funded study led by the Kaiser Permanente Northern California Division of Research found an increased risk of arterial thrombotic events (ATE) and venous thromboembolic events (VTE) - commonly referred to as blockage of arteries and blood clots, respectively - associated with drospirenone-containing birth control pills compared to four low-dose estrogen combined hormonal contraceptives. The study appears in the current online issue of Contraception...
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