Observations on the effect of metoclopramide (Primperan) on the human ureter. A preliminary communication.

Metoclopramide, a procainamide derivative with a documented effect on the gastro-intestinal motility, was given to four patients with hydroureter. It induced strong peristalsis in the ureter, manifested clinically as relief of pain and fluoroscopically as emptying of the ureter and the renal pelvis.