Management of Cough, Congestion, and Runny Nose in Asthmatic Patients

Immediate Assessment and Optimization

The American College of Chest Physicians suggests that patients with upper airway cough syndrome (UACS) complicating their asthma should be started immediately on a first-generation antihistamine-decongestant combination plus an intranasal corticosteroid spray while optimizing their asthma controller therapy 1, 2
Verify that the patient is using their inhaler correctly, as improper inhaler technique is a common cause of treatment failure, and confirm that the inhaled corticosteroid itself is not paradoxically triggering cough from the aerosol constituents 2
A one-week duration of symptoms with congestion and runny nose strongly suggests UACS, which should be addressed first in the systematic evaluation 1, 2

Start a first-generation antihistamine-decongestant combination, such as chlorpheniramine with pseudoephedrine or phenylephrine, to address UACS symptoms 1, 2
Add intranasal corticosteroid spray to address the nasal inflammation 2
Noticeable improvement is often seen within days to 1-2 weeks, though complete resolution may take several weeks to a few months 1

Consider stepping up the inhaled corticosteroid dose if cough persists after addressing UACS, as recommended by the American Thoracic Society 3, 2
Add a leukotriene receptor antagonist, such as montelukast or zafirlukast, if response remains incomplete after optimizing UACS treatment, as suggested by the American Academy of Family Physicians 4, 3, 2

For asthma exacerbations, nebulized ipratropium bromide 500 mcg should be added to beta-agonists only if the patient is not improving with initial treatment, as recommended by the Thorax journal 5, 6

Complete resolution of cough may require up to 8 weeks of treatment with inhaled corticosteroids, even though partial improvement often occurs after 1 week, according to the American Thoracic Society 2
The American Thoracic Society warns against abandoning therapy after only 1-2 weeks 2

If symptoms persist despite optimized UACS treatment, add or increase intranasal corticosteroid, nasal anticholinergic, or nasal antihistamine if nasal symptoms continue, as recommended by the American College of Chest Physicians 1
Obtain sinus imaging to evaluate for acute or chronic sinusitis if UACS symptoms persist, as suggested by the American College of Chest Physicians 1

Do not diagnose "unexplained cough" until completing systematic evaluation of UACS, asthma, and GERD with adequate treatment trials of appropriate duration, as recommended by the American Thoracic Society 2
Do not use antibiotics unless bacterial infection is documented, according to the Thorax journal 7
Do not add nebulized ipratropium to routine asthma management unless treating acute severe asthma that is not responding to beta-agonists alone, as recommended by the Thorax journal 5, 6