Treatment of Acute Otitis Externa

Introduction to Ear Drops

The American Academy of Otolaryngology-Head and Neck Surgery guidelines establish that topical antimicrobial therapy with or without steroids is first-line treatment for acute otitis externa 1, 2
Mineral oil has no antimicrobial or anti-inflammatory properties and is not indicated for treating active ear infections 3, 1
Prednisolone combined with antimicrobials is the evidence-based treatment for acute otitis externa, providing both anti-inflammatory effects and bacterial coverage 3, 1

Symptoms of acute otitis externa include rapid onset ear pain, itching, or fullness, tenderness of tragus or pinna, and ear canal inflammation with edema, erythema, or discharge 2, 4
The American Academy of Otolaryngology-Head and Neck Surgery recommends checking tympanic membrane integrity before prescribing topical therapy 5, 6
Combination antibiotic/steroid drops achieve clinical cure in approximately 74% of patients within 7 days, and symptoms typically improve within 48-72 hours of initiating appropriate topical therapy 3, 7

Administer 3-5 drops of combination antibiotic/steroid drops twice daily with the patient lying on their side with the affected ear up for 3-5 minutes 7
Continue treatment for a minimum of 7 days 7

Oral analgesics, such as acetaminophen or NSAIDs, are essential during the first 48-72 hours of treatment 3, 1
Do not rely on topical anesthetic drops as they can mask treatment failure 3, 1

Never use mineral oil alone to treat active ear infections, as it lacks antimicrobial and anti-inflammatory properties 3
Do not use prednisolone-only drops without antimicrobial coverage for acute bacterial otitis externa, as 98% of cases are bacterial 2
Reassess patients who fail to improve within 48-72 hours to evaluate for canal obstruction, poor adherence, or alternative diagnosis 5

Hydrocortisone itself can cause allergic contact dermatitis in susceptible individuals, though less commonly than neomycin, according to the American Academy of Otolaryngology-Head and Neck Surgery 8
Triamcinolone-containing preparations have also been associated with contact sensitivity, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 8
If allergic contact dermatitis develops, the American Academy of Otolaryngology-Head and Neck Surgery suggests discontinuing the sensitizing agent and considering alternative anti-inflammatory topicals such as calcineurin inhibitors (tacrolimus 0.1% ointment or pimecrolimus 1% cream) 9, 10

The American Academy of Otolaryngology-Head and Neck Surgery recommends using topical corticosteroids as part of management for eczema or seborrheic dermatitis affecting the ear canal, and applying emollients and preventing secondary skin infection 9