The effect of Dodine on the intestine was studied after a single administration of 1000 mg/kg, which corresponds to the LD50 in male Wistar rats. At this dose, a significant decrease in body weight was observed, accompanied by diarrhea, which may be associated with intestinal alterations. The chemical induced a significant reduction of the protein con tent and in sucrase activity in the jejunum. Morphological alterations included a significant decrease in crypt height and in villus length and depth. The intestinal modifications observed in animals after Dodine administration may explain the observed loss in body weight and diarrhea.