Can you tell me how long does it take for an ear infection to go away after antibiotic treatment?

Many issues: If the abx is effective the middle ear pus should be sterilized within 3-4 days. Fever should be down also. The fluid that is trapped with the infection may persist for 4-6 weeks. Fever persisting > 3 d should prompt a call to the treating physician.All infants should have a followup visit after 3-4 wks to monitor the progress of treatment. Adults clear sooner, followup if hearing impaired > 4wks.