otitis media
"My oldest son had ear infections monthly for nearly 2yrs. Doctors only prescribed cedifner when the infection was really bad, otherwise it was Amoxocillian. Both cleared his infections, though cefdiner worked faster. No reactions. 
My youngest son turned out to be allergic to Amoxocillian which gave him puffy horrid diaper rashes. He is only able to take Cefdiner and has no reactions to that antibiotic."