I might have to be a bit of a guinea pig then.
Some info on Sulfonylureas/Glipizide:
"Glipizide increases insulin secretion from the pancreas. This organ produces insulin. Glipizide makes tissues more sensitive to insulin. This means better blood sugar control."
"Until 1994, sulfonylureas were the only oral medications for diabetes available in the US. These medications act to force your pancreas to make more insulin, which then lowers your blood sugar.
For this medication to work, your pancreas has to make some insulin. If your pancreas makes no insulin at all, you aren't a good candidate for this class of drugs. Also, if you have an allergy to sulfa drugs you should probably avoid sulfonylureas."