Antibiotic Use in Acute Bronchitis

Introduction to Antibiotic Use

The American College of Physicians recommends that antibiotics are not indicated for acute uncomplicated bronchitis in otherwise healthy adults, as this condition is viral in 89-95% of cases and antibiotics provide minimal benefit while causing significant adverse effects and promoting antibiotic resistance 1

The European Respiratory Society suggests that before diagnosing acute bronchitis, pneumonia should be excluded by checking for heart rate >100 beats/min, respiratory rate >24 breaths/min, oral temperature >38°C, and abnormal chest examination findings, and if any of these are present, chest radiography should be obtained to rule out pneumonia 1
The American Thoracic Society recommends that patients with suspected pertussis (whooping cough) should be isolated for 5 days from the start of treatment, and early treatment within the first few weeks diminishes coughing paroxysms and prevents disease spread 1

The Infectious Diseases Society of America suggests that high-risk patients with significant comorbidities, such as age >75 years with cardiac failure, insulin-dependent diabetes mellitus, serious neurological disorders, or immunosuppression, may require antibiotics if fever persists >3 days 1, 2
The European Society of Clinical Microbiology and Infectious Diseases recommends that if antibiotics are indicated in high-risk patients, the recommended regimen is amoxicillin 500 mg three times daily for 5-8 days or doxycycline 100 mg twice daily for 5-8 days 1, 2

The American Academy of Family Physicians recommends that patients should be informed that cough typically lasts 10-14 days after the visit, even without antibiotics, and may persist up to 3 weeks, and β2-agonist bronchodilators may be useful in select patients with wheezing accompanying the cough 1
The American College of Chest Physicians suggests that codeine or dextromethorphan may provide modest effects on severity and duration of cough, particularly when dry cough is bothersome and disturbs sleep 1

The American Academy of Family Physicians recommends that patients should return if fever persists >3 days, cough persists >3 weeks, or symptoms worsen rather than gradually improve 1

The Infectious Diseases Society of America warns that the presence of fever does not automatically indicate bacterial infection requiring antibiotics, and fever persisting beyond 3 days strongly suggests bacterial superinfection, but initial fever in the first 1-3 days is consistent with viral bronchitis 1, 3