Severe Cough with Vomiting: Treatment Approach

Immediate Diagnostic Considerations

The American Academy of Pediatrics and other medical societies recommend that pertussis must be ruled out first when post-tussive vomiting is present, even in vaccinated patients, as breakthrough infections occur and early macrolide treatment diminishes paroxysms and prevents transmission 1, 2, 3
Nasopharyngeal culture should be obtained if pertussis is suspected based on paroxysmal coughing episodes, post-tussive vomiting, or inspiratory whooping sound, as recommended by the Centers for Disease Control and Prevention 2, 3
If pertussis is confirmed or highly suspected, the American Academy of Family Physicians recommends prescribing macrolide antibiotics immediately (azithromycin or clarithromycin) to reduce coughing severity and prevent spread 2, 3

The American College of Chest Physicians recommends prescribing inhaled ipratropium bromide 2-3 puffs four times daily, which has the strongest evidence for attenuating post-infectious cough with fewer systemic side effects compared to other options 1, 2
A first-generation antihistamine/decongestant combination (brompheniramine/pseudoephedrine or chlorpheniramine/phenylephrine) should be added starting once-daily at bedtime for 2-3 days, then advance to twice-daily to minimize sedation, as suggested by the American Academy of Otolaryngology 1
Intranasal corticosteroid spray (fluticasone or mometasone) should be added to decrease airway inflammation, as recommended by the American Academy of Allergy, Asthma, and Immunology 1

After 2 weeks of adequate therapy without improvement, the American Thoracic Society recommends evaluating sequentially for asthma/non-asthmatic eosinophilic bronchitis and GERD 1
Patients with severe cough and vomiting who fit the clinical profile for GERD should be prescribed antireflux treatment even without typical GI symptoms, as GERD can present with cough alone, according to the American Gastroenterological Association 4
High-dose PPI therapy (omeprazole 40 mg twice daily), dietary modifications, and lifestyle changes should be initiated, as recommended by the American College of Gastroenterology 4, 1
GERD-related cough may require 2 weeks to several months for response, with some patients needing 8-12 weeks, so adequate treatment duration is essential before declaring failure, as suggested by the American Gastroenterological Association 4, 1

The American Academy of Family Physicians recommends not prescribing antibiotics for post-infectious viral cough, as they provide no benefit, contribute to resistance, and cause adverse effects including allergic reactions and C. difficile infection 1, 2
Nasal decongestant sprays should not be used for more than 3-5 days due to rebound congestion risk, as warned by the American Academy of Otolaryngology 1
The American College of Chest Physicians recommends not diagnosing "unexplained cough" until completing systematic evaluation of upper airway cough syndrome, asthma, and GERD with adequate treatment trials 1
The American Gastroenterological Association recommends not assuming GERD is ruled out simply because of prior antireflux surgery, as reflux can persist 4

A chest radiograph should be ordered to rule out persistent pneumonia, masses, interstitial disease, or congestive heart failure, as recommended by the American College of Radiology 1
High-resolution CT chest should be ordered to evaluate for bronchiectasis, interstitial lung disease, or occult masses, as suggested by the American Thoracic Society 1
24-hour esophageal pH monitoring should be considered if GERD remains suspected despite failed empiric therapy, as this is the most sensitive and specific test, according to the American Gastroenterological Association 4, 1
Bronchoscopy should be considered to evaluate for endobronchial lesions, sarcoidosis, eosinophilic bronchitis, or occult infection, as recommended by the American Thoracic Society 1

The American Gastroenterological Association recommends that in patients with chronic cough due to GERD that has failed maximal medical therapy for a minimum of 3 months, and who have positive 24-hour esophageal pH monitoring showing persistent reflux despite treatment, antireflux surgery is recommended if the patient reports unsatisfactory quality of life 4