While many diabetics use insulin injections or insulin pumps to control their diabetes, others use oral medications, such as glipizide or glimepiride, according to WebMD. These medications are both sulfonylureas that cause the pancreas to increase the amount of insulin it produces.
Saxagliptin, sitagliptin and alogliptin are types of drugs doctors sometimes call DPP-IV inhibitors, reports WebMD. These oral medications boost the amount of insulin in the blood and reduce the amount of glucose the liver produces. They do not cause weight gain like sulfonylureas do. Some patients require prescriptions of more than one oral medication to control blood sugar, and there are several prescription medications that combine two oral medications into a single pill.