Metabolism may be influenced during concomitant use w/ CYP2C9 inducers (eg, rifampicin) or inhibitors (eg, fluconazole). Increased AUC by fluconazole. Potentiation of blood glucose-lowering effect by phenylbutazone, azapropazone, oxyfenbutazone, insulin & oral antidiabetics (eg, metformin), salicylates, p-aminosalicylic acid, anabolic steroids & male sex hormones, chloramphenicol, certain long-acting sulfonamides, tetracyclines, quinolones & clarithromycin, coumarin anticoagulants, fenfluramine, disopyramide, fibrates, ACE inhibitors, fluoxetine, MAOIs, allopurinol, probenecid, sulfinpyrazone, sympatholytics, cyclophosphamide, trophosphamide & iphosphamides, miconazole, fluconazole, pentoxifylline (high dose parenteral), tritoqualine. Weakening of blood glucose-lowering effect by oestrogens & progestogens, saluretics, thiazide diuretics, thyroid stimulating agents, glucocorticoids, phenothiazine derivatives, chlorpromazine, adrenaline & sympathicomimetics, nicotinic acid (high doses) & nicotinic acid derivatives, laxatives (long term use), phenytoin, diazoxide, glucagon, barbiturates & rifampicin, acetazolamide. Blood glucose-lowering effect may be potentiated or weakened by H
2-antagonists, β-blockers, clonidine, guanethidine & reserpine. Alcohol intake may potentiate or weaken the hypoglycaemic action. May potentiate or weaken the effects of coumarin derivatives. Reduced GIT absorption by colesevelam.