The nurse is caring for a 2 year-old male client with severe dehydration. Upon discussion with the child's parents, they report that their child has been drinking traditional herb mixtures made by the traditional medicine doctor in their small village. When reviewing the ingredients of the mixture with the family, the nurse suspects that they are contributing and exacerbating the child's diarrhea leading to dehydration. Which of the following is the most appropriate next step to take in caring for the child and mother?