• D Patterson, T Abell, R Rothstein, K Koch, and J Barnett.
• Virginia Mason Clinic Hospital, Seattle, Washington 98101, USA.
• Am. J. Gastroenterol. 1999 May 1; 94 (5): 1230-4.

ObjectiveA double-blind, multicenter, randomized trial was conducted to compare the side effects and efficacy of domperidone and metoclopramide in symptomatic diabetic gastroparesis.MethodsNinety-three insulin-dependent diabetes patients with a > or = 3-month history of gastroparesis symptoms were recruited; 48 received domperidone 2 x 10-mg tablets 4 times daily, and 45 received metoclopramide 1 x 10-mg tablet + 1 placebo tablet 4 times daily. Nausea, vomiting, bloating/distension, and early satiety were evaluated for severity after 2 and 4 wk. Adverse central nervous system (CNS) effects of somnolence, akathisia, asthenia, anxiety, depression, and reduced mental acuity were elicited and graded for severity at 2 and 4 wk.ResultsDomperidone and metoclopramide were equally effective in alleviating symptoms of diabetic gastroparesis. Elicited adverse CNS effects were more severe and more common with metoclopramide. Somnolence was acknowledged by 49% of patients (mean severity score, 1.03) after 4 wk of metoclopramide compared with 29% of patients (mean severity score, 0.49) after 4 wk of domperidone (incidence, p = 0.02; severity; p = 0.03). A reduction in mental acuity was acknowledged by 33% of patients (mean severity score, 0.62) after 4 wk of metoclopramide, compared with 20% of patients (mean severity score, 0.27) after 4 wk of domperidone (incidence, p = 0.04; severity, p = 0.04). Akathisia, asthenia, anxiety, and depression were also acknowledged less often, and at a lower severity, after 4 wk of domperidone, although these differences were not statistically significant.ConclusionsDomperidone and metoclopramide effectively reduce the symptoms of diabetic gastroparesis; CNS side effects are more pronounced with metoclopramide.

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