diabetes drug avandia be pulled off the market. cnn s chief medical correspondent, dr. sanjay gupta explains why. turn it on. and let it heat up. reporter: edward darden was diagnosed with diabetes two years ago. in 2006, he started take ago va taking avandia. and then the headline, a 43% increase in heart attacks for people on avandia. the dr. steven neeson wrote about it. we ve had information for several years that avandia increases the risk of heart attack inpatients. reporter: in 2007, this same panel voted, 22 to 1, that the evidence was too weak to take it off the market. one reason, a large clinical trial called record. it was funded by glaxosmithkline, the company