Management of a Child with Post-Tussive Vomiting and Nocturnal Cough

Diagnostic Considerations

Post-tussive vomiting in children is suggestive of pertussis, with moderate sensitivity (60.0%) and specificity (66.0%) 2
When evaluating a child with cough and post-tussive vomiting, assess for the three classical characteristics of pertussis: paroxysmal cough, post-tussive vomiting, and inspiratory whooping 1, 3

Consider pertussis testing when post-tussive vomiting is present in a child with acute cough (< 4 weeks duration) 4, 5
Obtain a chest radiograph to rule out other causes of cough, especially since the child has diminished sleep quality 5, 6
When age-appropriate, perform spirometry (pre and post β2 agonist) to assess for possible reactive airway disease 5
Tests for Bordetella pertussis should be considered, including PCR, culture, or serology based on availability 2, 7

If pertussis is suspected, initiate appropriate antibiotic therapy (macrolides such as azithromycin) early to prevent spread of disease, even though it may not alter the clinical course if started late 2, 3
Antibiotics are most effective when started early in the course of illness 3
If symptoms persist beyond 4 weeks, reclassify as chronic cough and follow pediatric-specific cough management protocols 4, 5, 7

Avoid empirical treatment approaches for conditions like asthma, gastroesophageal reflux disease, or upper airway cough syndrome unless other features consistent with these conditions are present 5, 7
Environmental factors that may exacerbate cough, such as tobacco smoke exposure, should be identified and eliminated 5

If cough persists despite appropriate management, or if new concerning symptoms develop, consider referral to a specialist 6