More than 100 million women use the oral contraceptive pill worldwide. Many types of pill are available and the choice of which one to use is important to the women who use them and their doctors. Two linked studies assess the risk of venous thromboembolism in women taking the combined oral contraceptive.
All oral contraceptives are effective in preventing pregnancy if they are taken correctly, so the choice of which one to use rests on the profile of side effects.
Venous thromboembolism is one of the most serious side effects, and although it is rare, it can cause death (in about 1-2% of all cases of venous thromboembolism in women taking the pill).
New research suggests that many women do not use the safest available types of oral contraceptives, with many of the most popular birth control pills, such as Yaz and Yasmin, carrying a higher risk of blood clots.
The study, published today in the British Medical Journal, found that oral contraceptives containing desogestrel, cyproterone acetate or drospirenone were up to twice as likely to cause blood clots in women as birth control pills containing levonorgestrel and low doses of estrogen.
The study found that switching to the safer forms of birth control, like Bayer AG’s Microgynon 30 that contains levonorgestrel, reduced health risks while keeping the same level of pregnancy prevention.
Continue reading