Increased risk of hypoglycemia w/ antidiabetic agents, ACE inhibitors, ARBs, disopyramide, fibrates, fluoxetine, MAOIs, pentoxifylline, pramlintide, propoxyphene, salicylates, somastatin analogs (eg, octreotide), sulfonamide antibiotics. Decreased blood glucose-lowering effect w/ atypical antipsychotics (eg, olanzapine & clozapine), corticosteroids, danazol, diuretics, estrogens, glucagon, INH, niacin, OCs, phenothiazines, progestogens (eg, in OCs), PIs, somatropin, sympathomimetic agents (eg, albuterol, epinephrine, terbutaline), thyroid hormones. Increased or decreased blood glucose-lowering effect w/ alcohol, β-blockers, clonidine, lithium salts. Hypoglycemia may sometimes followed by hyperglycemia w/ pentamidine. Blunted signs & symptoms of hypoglycemia w/ β-blockers, clonidine, guanethidine, reserpine.