Treatment of Severe Gastroparesis

Initial Dietary Management

The American Gastroenterological Association recommends implementing 5-6 small, frequent meals daily focusing on low-fat, low-fiber foods with small particle size to minimize gastric distension and promote faster emptying 1, 3
Patients with severe symptoms who cannot tolerate solids should replace solid foods with liquids (soups, nutritional supplements) 3
High-fat foods (limit fat to <30% of total calories) and high-fiber foods that delay gastric emptying should be avoided 1, 3
Complex carbohydrates and energy-dense liquids in small volumes can be used to maximize caloric intake 3

The American Gastroenterological Association recommends metoclopramide 10 mg three times daily before meals as the only FDA-approved medication for gastroparesis 1, 2
Metoclopramide should be treated for at least 4 weeks to determine efficacy in diabetic gastroparesis 3
Metoclopramide should not be continued beyond 12 weeks without careful reassessment due to FDA black box warning for tardive dyskinesia 2, 4
Domperidone 10-20 mg three times daily is an alternative with lower CNS side effects but requires QTc monitoring for cardiac risk 1, 3, 4
Erythromycin 250 mg three times daily can be used for short-term management, but tachyphylaxis develops rapidly, limiting effectiveness beyond a few weeks 2, 5, 4

5-HT3 receptor antagonists (ondansetron 4-8 mg 2-3 times daily or granisetron 1 mg twice daily or 34.3 mg patch weekly) are effective for refractory nausea by blocking serotonin receptors in the chemoreceptor trigger zone 1, 6, 7, 3
NK-1 receptor antagonists (aprepitant 80 mg/day) may benefit up to one-third of patients with troublesome nausea, particularly in idiopathic gastroparesis 1, 6, 7
Phenothiazines (prochlorperazine 5-10 mg four times daily or chlorpromazine 10-25 mg 3-4 times daily) reduce nausea and vomiting through dopamine receptor inhibition 1, 6, 7, 3

Tricyclic antidepressants (nortriptyline or desipramine 25-100 mg/day) act as neuromodulators for patients with significant visceral abdominal pain 1, 6, 7
Gabapentin >1200 mg/day in divided doses or pregabalin 100-300 mg/day can be used for neuropathic-type pain 1, 6, 7
Duloxetine 60-120 mg/day is an alternative SNRI option for pain management 1, 6, 7

GES is FDA-approved under Humanitarian Device Exemption for severe, drug-refractory gastroparesis (particularly diabetic and postsurgical) 1, 2, 6, 7, 5
Efficacy is variable but may significantly reduce nausea, vomiting frequency, and need for nutritional supplementation in open-label studies 1

Jejunostomy tube feeding should be considered when patients cannot maintain adequate oral intake despite medical therapy 1, 3

Evaluate treatment effectiveness at 4 weeks for metoclopramide 3
Reassess at 12 weeks before continuing any prokinetic beyond this timeframe 2, 4
Monitor for extrapyramidal symptoms with metoclopramide use 4
Check QTc interval if using domperidone 4
Monitor nutritional status, weight, and micronutrient levels (vitamin B12, vitamin D, iron, calcium) in all patients 3