This is an antibiotic for ear infections. My son is on day 3 of 10 of this stuff and already has mild diarrhea. Dr says to finish the medication and does not have any advice other than giving yogurt, which I do, but it doesn’t help. The symptoms of ear infection are gone. Are there any pro-biotic supplements or anti-diarrheal treatment safe for 5-year old kids? Note that my son is big for his age, he weighs 52lb. Thanks!