 [ Symptoms ] newer cold and flu remedies for infants [ Disease ] i do not know why she tested positive either zofran is for vomiting and nausea and it is not your culprit it is very possible it was lab error maybe the blood got mixed up it happens even with checks and balances in place re test is needed i even had a ct scan and was given a diagnosis then later an mri was done the doctor told me that the two were not of the same brain mistakes can happen so have your mom re tested