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Coming up on 54 minutes after the hour. a health alert you need to know about. avandia has been plagued by questions about its safety lately. more studies say the popular drug to treat diabetes may increase the risk of heart takes. >> cnn's chief medical correspondent dr. sanjay gupta joins us from atlanta. there is a lot of confusion about this, whether or not avandia does damage the heart and if you have diabetes, what do you do? >> right. good morning. this was the top selling diabetes drug in the world at one point, avandia. there has been a lot of safety concerns over the last three years...

Hundreds of thousands of them. you find that if you are taking avandia, elderly patients, 27% increased risk of stroke, 25% increased risk of heart failure. 14% increased risk of death. those are the numbers according to the new large study. that's the one getting the attention this week. now, i will tell you that a lot of people will say, well, are diabetics perhaps more at risk for those things anyway? how do you know if it is the medication or disease itself which is why some of the numbers i'm about to show you are particularly important. what they looked at here was people who are on avan...