A new study backs up concerns of previous studies that show birth control pills containing the hormone drospirenone, such as Yaz and Yasmin, are more likely to cause deadly blood clots than oral contraceptives made with older generation hormones.
The study, released last month, puts the blood clot risk with drospirenone-containing pills at 43 to 65 percent greater when compared to pills with other types of hormones. The latest study is based on data from 330,000 Israeli women.
Previous research, involving 835,826 women ranging in age from 10 to 55 who were taking pills like Yaz, suggested the blood clot risk was as much as 74 percent greater with drospirenone pills compared to oral contraceptives containing older hormones.
All birth control pills carry a risk for blood clots, but the latest study provides more evidence that pills like Bayer’s Yaz and Yasmin may be even more dangerous. Blood clots can lead to serious complications such as strokes, heart attacks and even death. The pills have also been associated with gallbladder damage.
Other pills that contain drospirenone include Bayer’s Beyaz and Safyral. There are also numerous generic versions available.
Tens of thousands of lawsuits have been filed by women who say they have suffered serious injuries from the pills, and who say Bayer did not adequately warn them that using the pills could put their lives at risk.
A Food and Drug Administration (FDA) advisory committee recently recommended that stronger warnings be placed on the packages of oral contraceptives containing drospirenone.