GCG and diabetes mellitus: These are some of the receptors and drugs that are now being employed in the treatment of diabetes for e.g. Insulin [5], GLP-1 [6], PPAR’s [7], Biguanides [8], Sulphonylureas [5], Glinides [5], Thiazolidinediones [5], Gliptins [5], α- Glucosidase inhibitors [5], Amylin analogues [5], SGLT-2 [9], Dopamine D-2 agonists [10].