Polymyxin B sulfate 10000Units, neomycin sulfate 3.5mg, hydrocortisone 10mg; per mL. Colistin sulfate is a polypeptide antibiotic which penetrates into and disrupts the bacterial cell membrane.

Initial treatment: hydrocortisone–terramycin–polymyxin B ear drops and oral penicillin. One week from first symptom: oral corticosteroids 50 mg daily for 10 days. One week and 5 days from first ...