WARFARIN, SALICYLATES, SULPHONAMIDES AND ALCOHOL POTENTIATE HYPOGLYCAEMIC EFFECT. GLUCOCORTICOIDS, THIAZIDE DIURETICS,ADRENALINE, AMINOGLUTETHIMIDE, CHLORPROMAZINE, DIAZOXIDE, ORAL CONTRACEPTIVES, RIFAMYCIN AND OESTROGEN REDUCE HYPOGLYCAEMIC EFFECT. AN INCREASED HYPOGLYCAEMIC EFFECT HAS BEEN SEEN WITH ACE INHIBITORS, ALCOHOL, ALLOPURINOL SOME ANALGESICS LIKE PHENYLBUTAZONE, SALICYLATES, AZOLE ANTIFUNGALS, CHLORAMPHENICOL, CIMETIDINE, CLOFIBRATE & RELATED COMPOUNDS, COUMARIN ANTICOAGULANTS, HEPARIN, MAOIS, OCTREOTIDE( ALTHOUGH THIS MAY ALSO PRODUCE HYPERGLYCAEMIA), RANITIDINE, SULFINPYRAZONE, SULFONAMIDES INCLUDING CO-TRIMOXAZOLE, TETRACYCLINES, TRICYCLIC ANTIDEPRESSANTS & THYROID HORMONES. BETABLOCKERS HAVE BEEN REPORTED BOTH TO INCREASE HYPOGLYCAEMIA AND TO MASK THE TYPICAL HYPOGLYCAEMIC WARNING SIGNS. SYNERGISTIC HYPOGLYCAEMIC ACTION WITH METFORMIN.