- Medications that may interfere with the study such as alpha-glucosidase inhibitors (acarbose: Glucobay), insulin-sensitising drugs (metformin: Glucophage, Glucophage SR, Eucreas, Janumet; thiazolidinediones: Actos, Competact), sulfonylureas (Daonil, Diamicron MR, Glibenese, Minodiab, Amaryl Tolbutamide), and lipid-lowering drugs (statins, nicotinic acid, colestyramine anhydrous, ezetimibe, fibrates). Other medications should be reviewed by medical representative from KCL on a case by case basis.