The effects of cisapride on gastric and oesophageal emptying in dystrophia myotonica

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Abstract
The effects of cisapride on gastric emptying, oesophageal emptying, and gastrointestinal symptoms were evaluated in 10 patients with dystrophia myotonica who had delayed gastric emptying of the solid and/or liquid component of a meal. A double isotope technique was used to measure gastric emptying and oesophageal emptying was measured as the time taken for a bolus of the solid meal to enter the stomach. Gastrointestinal symptoms were assessed by a questionnaire. Gastric and oesophageal emptying and gastrointestinal symptoms were measured before and when each subject had taken cisapride (10 mg, q.i.d., p.o.) for 4 weeks. Cisapride improved solid gastric emptying, and there was a non‐significant trend for improved liquid emptying. Cisapride had no effect on oesophageal emptying. Upper gastrointestinal symptoms were less after cisapride and there was an increased frequency of bowel actions. No side effects were reported. These results indicate that gastroparesis is a treatable cause of morbidity in dystrophia myotonica.