Abstract
During intravenous urography, the changes in the gastrointestinal tract were assessed in a total of 101 patients within two subgroups: allergic and non-allergic, depending on the patient's reaction or non-reaction to the intravenously injected Conrary 420. The gastrointestinal changes were either nil (that is normal) or abnormal with definite increase in the total volume of gas in the abdomen. Increased gas was commoner (66%) among the non-allergic group as compared with 34% of the allergic group. The aetiological basis being postulated for this observation includes biochemical and chemical changes as well as allergic response within the gut.