Uricosuric properties of diflunisal in man

1 The uricosuric effect of diflunisal was studied in eleven normal subjects. 2 Urine and serum uric acid levels were measured and used to assess the effect. 3 Diflunisal caused statistically significant decreases in serum uric acid levels and increases in uric acid clearance at 250 and 375 mg twice daily. 4 Diflunisal taken on an empty stomach caused epigastric discomfort in the high dose group which was obviated when the drug was taken with meals. 5 Diflunisal caused no abnormalities in the measured haematological, urological or biochemical parameters.