Treatment of Polymyxin Otitis Externa

First-Line Treatment

• The American Academy of Otolaryngology-Head and Neck Surgery recommends topical quinolone ear drops as first-line therapy due to increasing resistance to polymyxin B and neomycin, and lack of ototoxicity risk 1
• Aural toilet should be performed before administering drops to ensure medication reaches infected tissues 2, 1

Administration Technique

• The American Academy of Otolaryngology-Head and Neck Surgery suggests having the patient lie with the affected ear upward 2
• Administer enough drops to fill the ear canal, and have the patient remain in this position for 3-5 minutes 2
• Use gentle to-and-fro movement of the pinna or tragal pumping to eliminate trapped air and ensure proper distribution 2, 3

Pain Management

• Assess pain severity and recommend appropriate analgesics based on pain severity, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 4, 1
• Pain typically improves within 48-72 hours of starting appropriate topical therapy 1

Special Considerations

• For patients with non-intact tympanic membrane, the American Academy of Otolaryngology-Head and Neck Surgery recommends avoiding ototoxic preparations and using non-ototoxic quinolone preparations instead 1, 5
• For high-risk patients, such as those with diabetes or immunocompromised states, monitor more carefully for signs of necrotizing otitis externa and consider systemic antibiotics in addition to topical therapy 1, 4

When to Consider Systemic Antibiotics

• Systemic antibiotics should not be used as initial therapy for uncomplicated otitis externa, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 4, 1
• Reserve oral antibiotics for specific circumstances, such as extension of infection beyond the ear canal or presence of cellulitis of the pinna or adjacent skin 4, 1, 5

Treatment Failure Considerations

• If no improvement occurs within 48-72 hours, consider inadequate drug delivery, allergic contact dermatitis, or fungal co-infection requiring antifungal therapy, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 1, 6

Patient Education

• Instruct patients on proper administration technique and inform them that symptoms typically improve within 48-72 hours, as recommended by the American Academy of Otolaryngology-Head and Neck Surgery 1, 3
• Advise patients to complete the full course of therapy even if symptoms resolve early and recommend keeping the ear dry during treatment 1, 2