To provide oral domperidone to patients between the ages of 18 and 60 years of age, according to the investigator's judgment, a prokinetic effect is needed for the relief of severe gastroparesis. We have defined severe gastroparesis as 1) positive gastric emptying scintigraphy (more than 10% residue at 4 hours), 2) nausea, 3) early satiety, 4) abdominal pain. We will recruit patients for two years and the patients will be given domperidone for up to two years.