Pharmacology acarbose is an oral glucosidase inhibitor indicated for the management of hyperglycemia caused by type 2 diabetes mellitus.Inhibition of this gut enzyme system effectively reduces the rate of complex carbohydrate digestion and the sub sequent absorption of glucose thereby lowering postprandial glucose excursions in type2 diabetes In obese and nonobese patients with type2 diabetes , acarbose monotherapy is associated with a 0.5%-1% decrease in hemoglobin A