Experiments on rats have shown that administration of furosemide, dichlothiazide and etacrinic acid (50 mg/kg intraperitoneally) reduced the development of experimental inflammatory edema caused by subplantar administration of 0.1 ml of 6% dextran or 10% ovalbumin. The antiedematous effect of the diuretics was preserved under the conditions of bilateral nephrectomy, which points to the presence of extrarenal mechanisms in the action of the drugs in experimental inflammation.