Many oral antidiabetic drugs are available for the treatment and control of the symptoms of T2DM, such as sulfonylurea agents, biguanides (e.g., metformin), thiazolidinedione (TZD) drugs (also known as glitazones), α-glucosidase inhibitors, and glucagon-like peptide-1 (GLP-1) inhibitors. The gene discussed is GCG; the disease is type 2 diabetes mellitus.