The effect of 4-amino-5-bromo-N-[2-(diethylamino)-ethyl]-2-methoxy benzamide (bromopride, Viaben) on the intestinal motility was studied in dogs. Highly sensitive transducers were implanted on the intestinal serosa, allowing to measure both electrical and mechanical impulses at the same point from the small intestine. These studies were performed in 5 dogs to which bromopride was administered in i.v. or i.m. doses of 10, 20 and 30 mg. The results of the studies were as follows: 1. Bromopride causes an increase in both the number and amplitude of the spikes; at the same time there is a significant increase in the number and amplitude of the intestinal contractions. 2. The average duration of the cycle of the myoelectric complex does not change. This indicates that bromopride has no effect on the normal cycle of motoric activity in the intestine. 3. Bromopride seems more effective in the fasted state than in the post-prandial phase. 4. The effect of i.v. infection is greater than that of i.m. injection and begins earlier.