Hi and welcome. Glucotrol is one of the sulfonyl ureas similar to Gliclazide and Diamicron. It stimualtes the pancreas to produce more insulin so can cause hypos if the pancreas is still working fairly well. I wonder what you mean by diabetes burn-out? If you are still overweight you may want to talk to the doc about increasing the Metformin and keeping the Glucotrol down with slightly increased carbs to get the BS balance under better control. The sulfonyl drugs tend to last for up to 10 hours roughly