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Certain drugs tend to produce hyperglycemia and may lead to loss of blood glucose control. These drugs include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium-channel-blocking drugs and isoniazid. When such drugs are administered to a patient receiving acarbose, the patient should be closely observed for loss of blood glucose control. When such drugs are withdrawn from patients receiving acarbose in combination with sulfonylureas or insulin, patients should be observed closely for any evidence of hypoglycemia.
Intestinal adsorbents (eg, charcoal) and digestive enzyme preparations containing carbohydrate-splitting enzymes (eg, amylase, pancreatin) may reduce the effect of acarbose and should not be taken concomitantly.
