Azithromycin Dosing Guidelines

Pediatric Dosing

For pediatric patients with Mycoplasma pneumoniae, the recommended dosing is 10 mg/kg on days 1 and 2, then transition to oral, or 10 mg/kg on day 1, then 5 mg/kg daily on days 2-5, according to the Clinical Infectious Diseases guideline 1
For pediatric patients with Chlamydia trachomatis or Chlamydophila pneumoniae, the recommended dosing is the same as for Mycoplasma pneumoniae, 10 mg/kg on day 1, then 5 mg/kg daily on days 2-5, according to the Clinical Infectious Diseases guideline 1

For hospitalized patients with Legionnaires' disease, the recommended dosing is 500 mg IV daily for 2-7 days, then oral to complete 7-10 days total, according to Praxis Medical Insights 2
For non-hospitalized patients with mild Legionnaires' disease, the recommended dosing is 500 mg on day 1, then 250 mg daily for 4 additional days, according to Praxis Medical Insights 2

The American College of Cardiology recommends obtaining a baseline ECG in patients with cardiac risk factors before initiating azithromycin therapy, according to Praxis Medical Insights 3
Azithromycin should be avoided in patients with a QTc interval >450 ms (men) or >470 ms (women), according to Praxis Medical Insights 3

Macrolide resistance, including azithromycin, varies geographically and temporally, particularly for group A streptococcus, according to the American Academy of Family Physicians 4
Azithromycin is not recommended as first-line treatment for strep pharyngitis, but can be used as an alternative in penicillin-allergic patients, according to the American Academy of Family Physicians 4
Limiting antibiotic exposure, considering viral etiology, using the shortest effective duration, and assessing clinical response are all important principles of antimicrobial stewardship, according to Praxis Medical Insights 3