First-Line Antibiotic Recommendations for Pediatric Outpatients with Pneumonia

Age-Based Treatment Recommendations

For pediatric outpatients with community-acquired pneumonia (CAP), the American Academy of Pediatrics recommends amoxicillin as the first-line antibiotic of choice, with specific dosing based on age and presumed pathogen 1, 2
For children under 5 years old with presumed bacterial pneumonia, the recommended treatment is oral amoxicillin 90 mg/kg/day in 2 doses 1, 2
For children under 5 years old with presumed atypical pneumonia, the recommended treatment is oral azithromycin 10 mg/kg on day 1, followed by 5 mg/kg/day once daily on days 2-5 1, 2
For children 5 years and older with presumed bacterial pneumonia, the recommended treatment is oral amoxicillin 90 mg/kg/day in 2 doses (maximum 4 g/day) 1, 2
For children 5 years and older with presumed atypical pneumonia, the recommended treatment is oral azithromycin 10 mg/kg on day 1, followed by 5 mg/kg/day once daily on days 2-5 (maximum 500 mg on day 1, followed by 250 mg on days 2-5) 1, 2

For Streptococcus pneumoniae (penicillin-susceptible) infections, the recommended treatment is oral amoxicillin (90 mg/kg/day in 2 doses or 45 mg/kg/day in 3 doses) 4, 5
For Mycoplasma pneumoniae or Chlamydophila pneumoniae infections, the recommended treatment is oral azithromycin (10 mg/kg on day 1, followed by 5 mg/kg/day once daily on days 2-5) 6, 7
For children over 7 years old with Mycoplasma pneumoniae or Chlamydophila pneumoniae infections, doxycycline (2-4 mg/kg/day in 2 doses) is a recommended treatment option 6, 7

For children with a history of possible, non-serious allergic reactions to amoxicillin, a trial of amoxicillin under medical observation or a trial of an oral cephalosporin with substantial activity against S. pneumoniae (cefpodoxime, cefprozil, or cefuroxime) under medical supervision are recommended treatment options 1, 2
Children on adequate therapy should demonstrate clinical and laboratory signs of improvement within 48-72 hours, and if the child's condition deteriorates or shows no improvement within 48-72 hours, further investigation should be performed 2
If community-associated MRSA is suspected, consider adding clindamycin (30-40 mg/kg/day in 3-4 doses) to the treatment regimen 8, 9

Underdosing amoxicillin, using standard doses (40-45 mg/kg/day) rather than the recommended higher doses (90 mg/kg/day) for pneumonia, may lead to treatment failure due to resistant pneumococci 1, 2
Inappropriate use of macrolides as first-line therapy for presumed bacterial pneumonia should be avoided, as macrolides should be reserved for atypical pneumonia or as add-on therapy 1, 2
Failure to reassess children not improving within 48-72 hours requires reevaluation 2