Decrease in blood glucose values w/ sulphonylurea, metformin & insulin. May affect bioavailability w/ digoxin. Simultaneous administration of cholestyramine, intestinal absorbents & digestive enzyme products should be avoided. Loss of glucose control w/ diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, OCs, phenytoin, nicotinic acid, sympathomimetics & INH. Reduction of post prandial blood glucose w/ neomycin.