Treatment Options for Severe Gastroparesis Without QTc Prolongation

Prokinetic Agents

The American Gastroenterological Association recommends prucalopride as a first-line prokinetic agent for severe gastroparesis, as it accelerates gastric emptying without cardiac effects, with small RCT data showing improvement in symptoms and quality of life in both diabetic and idiopathic gastroparesis 1
Metoclopramide is an alternative prokinetic agent that does not cause QTc prolongation, but its use is limited to 12 weeks maximum due to the risk of tardive dyskinesia and other extrapyramidal side effects, with dosing at 5-20 mg three to four times daily 2, 3

The American College of Gastroenterology recommends aprepitant and tradipitant as highly effective options for nausea and vomiting without cardiac concerns, with RCT data showing improvement in nausea and vomiting scores in gastroparesis patients 4, 5
Phenothiazines, such as prochlorperazine, are dopamine antagonists without QTc effects, but have limited prospective data in gastroparesis specifically, with dosing at 5-10 mg four times daily 2, 4

The American Neurogastroenterology and Motility Society recommends amitriptyline as a preferred option for visceral pain in severe gastroparesis, as it does not prolong the QTc interval and also helps with nausea, with dosing at 25-100 mg/day 1, 2

The FDA recommends gastric electrical stimulation as an approved option under Humanitarian Device Exemption for severe refractory gastroparesis, with gastric per-oral endoscopic myotomy (G-POEM) and endoscopic botulinum toxin A injection as alternative options 1, 2

The American Heart Association recommends against the use of domperidone due to its significant QTc prolongation risk, especially at doses above 10 mg three times daily, with 7% of patients in one cohort study having cardiac side effects requiring drug cessation 2, 6
The American College of Cardiology recommends avoiding ondansetron and granisetron due to their QTc prolongation risk, despite their efficacy in reducing symptom scores in refractory gastroparesis 2, 4, 5