Based on experience with Glimepiride and known interactions for other sulfonylureas, the following interactions must be considered.In addition to insulin and other oral antidiabetic agents, drugs which may potentiate the hypoglycaemic action of Glimepiride include: ACE inhibitors, aminosalicylic acid, anabolic steroids and male sex hormones, azapropazone, chloramphenicol, ciofibrate, coumarin derivatives, cyclophosphamide, disopyramide, fenfluramine, fenyramidol, fibrates, fluconazole, fluoxetine, guanethidine, ifosfamide, MAO-inhibitors, miconazole, oxpentifylline (high dose parenteral), oxyphenbutazone, para-aminosalicylic acid, phenylbutazone, probenecid, quinolones, salicylates, sulphinpyrazone, sulfonamide antibiotics, tetracyclines, tritoqualine, trofosfamide.Drugs which may attenuate the hypoglycaemic action of Glimepiride include: Acetazoiamide, barbiturates, calcium channel blockers, corticosteroids, diazoxide, diuretics, glucagon, isoniazid, laxatives, nicotinic acid (high doses), oestrogens, phenothiazines, phenytoin, progestagens, rifampicin, sympathomimetic agents, thyroid hormones. H2 receptor antagonists, beta-blockers, clonidine and reserpine may lead to either potentiation or weakening of the blood-glucose-lowering effect. Concomitant treatment with a beta-receptor blocker, clonidine, guanethidine or reserpine may mask the warning symptoms of a hypoglycaemic attack. Acute and chronic aicohol intake may either potentiate or attenuate the activity of Glimepiride in an unpredictable fashion.