An inhibitor of alpha Glucosidase that retards the Digestion and Absorption of Carbohydrates in the Small Intestine and hence reduces the increase in Blood-Glucose concentrations after a carbohydrate load. It is given orally to non-Insulin dependent Diabetes Mellitus Patients where Diet modification or oral Hypoglycemic Agents do not control their condition. (From Martindale The Extra Pharmacopoeia, 31st ed)