the last five day treatment is probably azithromycin - an antibiotic that you take for five days but stays working for ten. this drug is convenient to take but many of the pathogens that cause middle ear infections in children are now resistant to it. the first drug was probably amoxicillin. your son may need something else assuming the infection is a bacterial type. many ear infections are viral. a child under six months who is getting ear infection is more likely to be a frequent-flyer of sorts. they may end up getting lots of them and often end up getting tubes. a child in day-care or one exposed to tobacco smoke is likely to get more ear infections. a child who was not or is not breat fed will also get more. the next step may be to see an ent specialist for a consultation. if your child has middle ear fluid that has been persistent the ent may recommend tubes.
my 6 month old has an ear infection. i have to take for 3rd time on tuesday to the doctor to see if it went away. i took him for the first time on december 6th and the again on december 13 before he finshed his 10 day treatment which would have been on started but their was no progres and i have to take him again on tuesday after a 5 day treatment.