diphenhydramine pediatric dosedexamethasone pediatric doseacetaminophen pediatric dosemetoclopramide pediatric dosehydrocortisone pediatric doseciprofloxacin pediatric doseerythromycin pediatric doseprednisolone pediatric doseazithromycin dose pediatricracemic epinephrine pediatric doseamoxicillin dosing pediatricfluconazole pediatric dose