The use of drospirenone-containing oral birth control pills is linked to a significantly higher risk of blood clots, both deep vein thrombosis and pulmonary embolism, according to an article in the CMAJ (Canadian Medical Association Journal). All oral contraceptives are associated with a higher risk of blood clots, but there is conflicting information about the risk of adverse events with drospirenone. Many previous studies have evaluated risks of second- and third-generation contraceptives, which both contain derivatives of testosterone...
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