Overview
Functional nausea is a symptom characterized by recurrent nausea without an identifiable organic cause, often associated with multiple comorbidities beyond the gastrointestinal tract 1.Diagnosis
Key Diagnostic Criteria: Meets Rome IV criteria for functional nausea 1.
Recommended Tests: Comprehensive evaluation including abdominal pain assessment, orthostatic intolerance screening (e.g., COMPASS 31), sleep disturbance evaluation, and psychological assessments (anxiety, depression) 1.
Common Comorbidities: Abdominal pain, headache, orthostatic intolerance, fatigue, disturbed sleep, anxiety, constipation, allergies, vomiting 1.Management
First-Line Treatments: Psychological interventions such as cognitive-behavioral therapy (specific dosing not detailed in abstracts).
Adjunctive Treatments: Metoclopramide; slow infusion (10 mg over 15 min) may reduce side effects like akathisia and sedation compared to bolus infusion 2.Special Populations
Pediatrics: Functional nausea in children often coexists with multisystem comorbidities including abdominal pain, headache, and anxiety; comprehensive symptom assessment tools like PROMIS-25 are useful 1.
Comorbidities: Significant overlap with conditions such as anxiety, sleep disturbances, and orthostatic intolerance noted across pediatric cases 1.Key Recommendations
Conduct a thorough evaluation for multisystem comorbidities in patients with functional nausea, including psychological and sleep assessments 1 (Evidence: Strong).
Consider slow infusion of metoclopramide (10 mg over 15 min) to manage nausea while reducing incidence of akathisia and sedation 2 (Evidence: Moderate).
Utilize validated symptom assessment tools like PROMIS-25 in pediatric patients to identify and manage comorbid conditions effectively 1 (Evidence: Strong).References
1 Tarbell SE, Sullivan EC, Meegan C, Fortunato JE. Children with Functional Nausea-Comorbidities outside the Gastrointestinal Tract. The Journal of pediatrics 2020. link
2 Tura P, Erdur B, Aydin B, Turkcuer I, Parlak I. Slow infusion metoclopramide does not affect the improvement rate of nausea while reducing akathisia and sedation incidence. Emergency medicine journal : EMJ 2012. link