At least 24 Canadian women taking Yaz and Yasmin birth control pills died from possible adverse reactions to the drugs since 2007.

A search of Health Canada’s adverse reaction database shows that since it came to market, 15 women on Yasmin and nine on Yaz have died, prompting their doctors to report a possible link to the extremely popular birth control pills.

The most common causes of death associated with the pills were blood clots.

While blood clots are listed as a potential side-effect for all hormonal birth control, especially for smokers and older women, the fatalities for Yaz and Yasmin are particularly high. Similar searches for Alesse pills and the Nuvaring found four and two deaths, respectively.

What’s more, eight of the Yasmin deaths were women and girls under 20, including two 14-year-olds.

This isn’t the first time the brands have come under fire. A 2011 Health Canada review found they had three times the risk of blood clots compared with other oral contraceptives.

Unlike other birth controls, Yaz and Yasmin contain the hormone drospirenone.

The U.S. Federal Drug Administration says drospirenone-based contraceptives increase blood clot risk by 74%.

A group of Canadians has launched a class-action lawsuit against the pharmaceutical company Bayer, which makes the pills.

The two brands have racked up more than 10,000 lawsuits south of the border.

A statement on Bayer’s website reads: "Bayer’s oral contraceptives have been and continue to be extensively studied worldwide and for most healthy women of reproductive age, the benefits … will outweigh the risks when used as directed."