Regina Kelly began taking the prescription drug Byetta in 2007 to help manage her Type 2 diabetes. Two years later, she switched to another drug called Januvia. One year after that, she was diagnosed with pancreatic cancer — and in 16 months, she was dead.

Kelly's brother, Moses Scott, who lives in Alexandria, Va., sued the manufacturers of those drugs on September 20, 2012. The case is the first of thousands expected on behalf of people who claim that taking the diabetes drugs or others like them caused pancreatic cancer.