Quoted from http://www.chicagotribune.com/health/ct-met-birth-control-risks-20130915,0,765904,full.story
Lawsuits pile up over popular birth control pill
FDA says contraceptives containing drospirenone may pose greater blood clot risk; industry-funded studies, some physicians say drugs are very safe
By Julie Deardorff, Chicago Tribune reporter
September 15, 2013
Peotone's Maggie Yunker had been taking birth control pills for a year when her doctor suggested switching to a brand that also could clear up acne and ease some aggravating symptoms related to her period.
Yunker was sold. But a year later, the 20-year-old suffered a life-altering stroke after multiple blood clots formed, broke free and lodged in her brain.
Though all oral contraceptives slightly increase the chance of developing blood clots in the legs and lungs, Yunker was taking Yaz, part of a newer generation of pills that the U.S. Food and Drug Administration says may pose a greater risk than similar types of birth control.