A new study finds that women taking newer type of birth control pills are more likely to develop dangerous blood clots.
The researchers reported that brands such as Yaz, Yasmin and Desogen increase the risk of developing blood clots when compared to the older versions.
In the study, a team led by Yana Vinogradova of the University of Nottingham in England, examined two large databases of patients in the U.K. The team looked for the blood clot risk in women of 15-49 age group taking birth control pills. The study revealed that women who consumed pills containing newer types of progesterone hormones such as drospirenone, gestodene and cyproterone are 1.5 to 1.8 times more likely to develop blood clots when compared to the women who took pills containing older types of progesterone such as levonorgestrel, norethisterone and norgestimate.
The study also revealed that women who consumed newer pills are 4 times more likely to develop blood clots whereas women who consumed older versions of birth control pills are 2.5 times more likely to develop blood clots.
However, the risk of blood clot is low for any one women using medications and remain lower than the clotting risk that occurs in pregnant women. To be exact, the threefold increased risk of blood clots due to birth control pills is less than the 10 fold risk of blood clots that arises in pregnant women.
Dr. Jennifer Wu, an obstetrician/gynaecologist at Lenox Hill Hospital in New York City agreed that the birth control pills have some ups and downs. She adds “Not only women have effective pregnancy protection; they may also enjoy the benefits of lighter and predictable menses… Yet risks of oral contraceptives should be considered.”
“The pills with higher risks include Yaz, Yasmin and Desogen. The doctors will need to consider this when starting a patient on oral contraceptives and considering the different brands” concludes Wu.
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