If you are taking the artificial insulin Lantus (insulin glargin) better run to your doctor to switch you off immediately. FDA announced that it is aware of four studies, three of which demonstrated a link between Lantus and cancer. A German study found possible 31% increased cancer risk for diabetics using Lantus. And a Swedish study showed that patients taking Lantus faced double the risk for breast cancer. While scientists are calling for further investigations and the FDA is reviewing different sources to better understand the risk of cancer associated with the use of Lantus, patients should stay away of the drug!