Doctors should prescribe the birth- control pills that are the least likely to cause blood clots, according to a study of more than 3,000 women published in the British Medical Journal.
Oral contraceptives containing levonorgestrel and a low dose of estrogen, such as Bayer AG’s Microgynon 30, were associated with the lowest risk of blood clots in the leg or lungs, researchers at Leiden University Medical Center in the Netherlands found. Birth-control pills containing desogestrel, cyproterone acetate or drospirenone carried about 1.5 to 2 times the risk of clots, they found.
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