Treatment of Flu-Associated Cough

Initial Management Approach

The American Thoracic Society recommends symptomatic treatment with dextromethorphan as the preferred cough suppressant for uncomplicated influenza with cough, while antibiotics should be reserved only for patients who develop bacterial complications such as pneumonia or worsening bronchitis 1, 2
Oseltamivir 75 mg every 12 hours for 5 days should be initiated if the patient presents within 48 hours of symptom onset with fever and influenza-like illness, with dose reduction to 75 mg once daily if creatinine clearance <30 ml/minute 3, 2

Previously well adults with acute bronchitis complicating influenza, in the absence of pneumonia, do not routinely require antibiotics, according to the Infectious Diseases Society of America 4, 3, 2
Simple cough with mild fever should be managed at home with antipyretics and fluids, and aspirin should be avoided in children under 16 years 5, 6

Consider antibiotics if previously well adults develop recrudescent fever or increasing dyspnea, and patients at high risk of complications should receive antibiotics when lower respiratory features develop 4, 3, 2
The preferred oral regimen for high-risk patients is Co-amoxiclav or tetracycline (doxycycline), with alternatives including Clarithromycin or erythromycin for penicillin-intolerant patients, and Fluoroquinolone with enhanced pneumococcal activity 4, 3, 2

For non-severe pneumonia, the preferred first-line therapy is oral co-amoxiclav or tetracycline, with macrolide or respiratory fluoroquinolone as alternatives, and antibiotics should be administered within 4 hours of admission 3, 2
For severe pneumonia, the recommended therapy is IV co-amoxiclav 1.2 g three times daily OR cefuroxime 1.5 g three times daily OR cefotaxime 1 g three times daily PLUS clarithromycin 500 mg twice daily IV or erythromycin 500 mg four times daily IV 4, 3, 2

Do not prescribe antibiotics for simple flu-associated cough without evidence of bacterial superinfection, as the majority of flu-associated coughs are viral and will not benefit from antibiotics 4, 3, 2
Staphylococcus aureus assumes greater importance during influenza outbreaks, and for severe pneumonia not responding to initial therapy, consider adding vancomycin 1 g twice daily IV for MRSA coverage 5, 6