Toddler 2 yr old had pneumonia

Hello mga mommies, sino po nakaencounter ang toddler nio po may pneumonia, then Ng prescribed po si doc Ng gamot( cefuroxime axetil) mapait po xa kaya ayaw ni lo, pero trying parin po na maitake nia kasi need nia po gumaling, pero bakit po kaya nag ka diarrhea, ok lng po kaya yun or need to stop the medicine. After 3 weeks pa check up nmin, and I don't have contact to the doc. Any suggestion? Thanks mga mommies....