What kind of medicine should be used for diabetes. If it is type 1 diabetes, it can only be treated with insulin, and no hypoglycemic drugs can be taken orally. If it is gestational diabetes, it can only be treated with insulin, not oral hypoglycemic drugs. Type 2 diabetes can be treated with oral medicine and insulin according to blood sugar and complications. The commonly used oral drugs generally include sulfonylurea hypoglycemic drugs, metformin hypoglycemic drugs, glycosidase inhibitors, etc.