Timmy, a two-year-old, has received two antibiotic courses (ampicillin, cefaclor) for acute otitis media during the past year. Today, his mom visits your pharmacy and mentions that they have just returned from an appointment with the boy's doctor. Timmy was diagnosed with otitis media with effusion, which the doctor described as fluid in the ears unaccompanied by fever or any signs of pain or d...