More than 50 women in Indianapolis have filed suit against the company, joining dozens of women nationwide who allege the birth control pills caused heart attacks, strokes, blood clots and other health problems, The Indianapolis Star reported Monday.
Yasmin and Yaz contain drospirenone, which the lawsuits allege can lead to dangerously high levels of potassium.
Bayer officials said the contraceptives are safe when used properly and that all packages of oral contraceptives, including Yasmin and Yaz, carry warnings of possible side effects.
David Stewart, a lawyer representing 12 of the Indiana women, said the warnings failed to state how serious the side effects could be.
"The reality is that Yaz and Yasmin are far more aggressive birth control drugs than previous generations," Stewart told The Star.