Increased AUC w/ fluconazole. Potentiated blood glucose-lowering effect w/ phenylbutazone, azapropazone, oxyfenbutazone; insulin, oral antidiabetics eg, metformin; salicylates, p-amino-salicylic acid; anabolic steroids, male sex hormones; chloramphenicol, long-acting sulfonamides, tetracyclines, quinolones, clarithromycin; coumarin anticoagulants; fenfluramine; fibrates; ACE inhibitors; fluoxetine, MAOIs; allopurinol, probenecid, sulfinpyrazone; sympatholytics; cyclophosphamide, trophosphamide, iphosphamides; miconazole; pentoxifylline (high dose IV); tritoqualine. Weakened blood glucose-lowering effect w/ oestrogens, progestogens; saluretics, thiazide diuretics; thyroid-stimulating agents, glucocorticoids; phenothiazine derivatives, chlorpromazine; adrenaline, sympathicomimetics; nicotinic acid (high dose) & derivatives; laxatives (long-term use); phenytoin, diaxozide; glucagon, barbiturates, rifampicin; acetazolamide. Potentiated or weakened blood glucose-lowering effect w/ H
2-antagonists, β-blockers, clonidine, reserpine. Potentiated or weakened hypoglycaemic action w/ alcohol. Potentiated or weakened effects of coumarin derivatives.