| Alternative Regimen |
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| Azithromycin suspension, 20 mg/kg/day orally, 1 dose daily for 3 days* |
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| *An association between oral erythromycin and azithromycin and infantile hypertrophic pyloric stenosis (IHPS) has been reported in infants aged <6 weeks. Infants treated with either of these antimicrobials should be followed for signs and symptoms of IHPS. |