CONCURRENT ADMINISTRATION OF BARBITURATES, CARBAMAZEPINE, PHENYTOIN, PRIMIDONE, OR RIFAMPICIN MAY ENHANCE THE METABOLISM AND REDUCE THE EFFECTS OF FLUNISOLIDE. CONCURRENT ADMINISTRATION OF FLUNISOLIDE WITH POTASSIUM-DEPLETING DIURETICS, MAY CAUSE EXCESSIVE POTASSIUM LOSS. USED WITH NSAIDS, THERE MAY BE AN INCREASED INCIDENCE OF G.I. BLEEDING AND ULCERATION. IT MAY DECREASE SERUM CONCENTRATIONS OF SALICYLATES AND MAY DECREASE THE EFFECT OF ANTIMUSCARINICS IN MYASTHENIA GRAVIS.