Enhanced hypoglycemic effect by: Anticoagulants, androgens, chloramphenicol, clofibrate, fenfluramine, fluconazole, histamine H
2-antagonists, Mg salts, methyldopa, phenylbutazone, probenecid, sulphonamides & urinary acidifiers. Inhibited hypoglycemic effect by: Blockers, rifampicin, diazoxide, thiazide diuretics & urinary alkalisers.