Acute Otitis Media Not Responding to First-Line Antibiotics — No Penicillin Allergy

Clinical Scenario

This protocol covers patients with acute otitis media who have no penicillin allergy and whose symptoms have not adequately resolved after initial antibiotic therapy. High-dose amoxicillin is the established first-line antibiotic of choice in this population, with amoxicillin-clavulanate indicated in certain situations.

When First-Line Therapy Has Not Worked

First-line management centres on high-dose amoxicillin (or amoxicillin-clavulanate where indicated), combined with adequate analgesic coverage. The expected clinical outcome is resolution of ear pain and fever at reassessment 48 to 72 hours after starting treatment. When those goals remain unmet at that reassessment point, escalation to a second-line approach is indicated.

Next Step: Second-Line Antibiotic Approach

After failure of first-line antibiotic therapy, the protocol calls for a change to a second-line antibiotic agent — either an amoxicillin-based combination or an injectable cephalosporin, depending on the clinical picture.

Agent selection, dosing, route, and course duration are detailed in the full structured protocol below.

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References

High-dose amoxicillin (80 to 90 mg per kg per day) is the antibiotic of choice for treating acute otitis media in patients who are not allergic to penicillin.

High-dose amoxicillin should be the initial treatment in the absence of a known allergy.

If a bulging, inflamed tympanic membrane is observed, therapy should be changed to a second-line agent.

For children initially on amoxicillin, high-dose amoxicillin/clavulanate is recommended.

Ceftriaxone (50 mg/kg IM or IV per day for 1 or 3 days, not to exceed 1 g per day)

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