Management of Postinfectious Cough

Clinical Context and Diagnosis

The American College of Chest Physicians suggests that postinfectious cough is defined as cough persisting 3-8 weeks following an acute respiratory infection, with key supporting features including clear chest X-ray and clear phlegm 2, 1
A clear chest X-ray is essential in ruling out pneumonia, malignancy, or other structural pathology, as recommended by the American College of Chest Physicians 3
Significant improvement with antibiotics and corticosteroids indicates the acute infectious/inflammatory phase has largely resolved, according to the American College of Chest Physicians 1

The American College of Chest Physicians recommends starting inhaled ipratropium bromide as first-line therapy for postinfectious cough, as it has been shown to attenuate cough effectively 1
Adding codeine or dextromethorphan is recommended when ipratropium alone is insufficient and cough significantly impacts quality of life, as suggested by the American College of Chest Physicians 2, 1
Inhaled corticosteroids may be considered if cough persists despite ipratropium and antitussives, to address persistent airway inflammation and bronchial hyperresponsiveness, according to the American College of Chest Physicians 1, 2

The American College of Chest Physicians advises against prescribing more antibiotics, as postinfectious cough is not caused by ongoing bacterial infection 1
Repeating systemic corticosteroids is not recommended unless cough becomes severely paroxysmal and other causes are excluded, as suggested by the American College of Chest Physicians 1

The American College of Chest Physicians expects gradual improvement over 2-4 weeks with the above regimen 1
Postinfectious cough typically resolves within 8 weeks total from onset, and if cough persists beyond 8 weeks, systematic evaluation for other causes such as UACS, asthma, and GERD is necessary, as recommended by the American College of Chest Physicians 2, 1