Enhanced blood-glucose-lowering effect & increased susceptibility to hypoglycaemia w/ oral antidiabetics, ACE inhibitors, disopyramide, fibrates, fluoxetine, MAOIs, pentoxifylline, propoxyphene, salicylates & sulfonamide antibiotics. Reduced blood-glucose-lowering effect w/ corticosteroids, danazol, diazoxide, diuretics, glucagon, INH, estrogens & progestogens, phenothiazine derivatives, somatropin, sympathomimetics (eg, epinephrine, salbutamol, terbutaline), thyroid hormones. Potentiated or weakened blood-glucose-lowering effect w/ β-blockers, clonidine, lithium salts or alcohol. Hypoglycemia may sometimes followed by hyperglycemia w/ pentamidine. Reduced or absent signs of adrenergic counter-regulation w/ sympatholytics eg, β-blockers, clonidine, guanethidine, reserpine.