Antibiotic dosing for acute otitis media in children: A weighty issue

Background: The American Academy of Pediatrics 2004 guidelines on diagnosis and management of acute otitis media (OM) recommends use of high-dose amoxicillin for the treatment of acute uncomplicated OM. With rising childhood obesity, recommended amoxicillin dose of 80 to 90 mg/kg per day often exceed standard adult dose of 1500 mg/d. Objective: To study prescribing patterns of primary care physicians for amoxicillin in the treatment of OM. To assess opinions of American Academy of Pediatrics subcommittee members who participated in guideline formulation. Methods: This study had 2 parts. Part 1: Retrospective review of medical records of children visiting the hospital between April and June 2008 and with a diagnosis of OM and were prescribed amoxicillin. Part 2: Web-based survey of 14 members of the OM guidelines subcommittee. Results: Part 1: Three hundred fifty-nine children were eligible, with a mean (SD) age of 3.2 (4.0) years and 185 (51.5%) of whom were males. Children weighing 20 kg or less received higher mean daily dose of amoxicillin (74.2 vs 40.4 mg/kg per day, P < 0.00). Part 2: Nine (64.3%) subcommittee members responded to the survey. Most (77.8%) affirmed that the impact of obesity on high-dose amoxicillin recommendation was not discussed during guideline formulation. If a patient's estimated amoxicillin dose exceeded the standard adult dose (1500 mg/d), 66.7% members would prescribe the standard adult dose whereas 33.3% would prescribe the recommended dose of 80 to 90 mg/kg per day. Conclusions: Primary care physicians prescribe a significantly lower-than-recommended amoxicillin dose in older children and those in the higher weight category. The opinion among subcommittee members regarding maximum dose specification of amoxicillin is varied.