If you have already made requests that your child be given medication for several days in a row, you may simplify your request.
Conversational flow and useful expressions
Whether medication is required
Medication administration request
In this case, it is not appropriate to use 「ありがとうございます」(arigato gozaimasu), which is a straightforward way of saying "thank you." Instead, you should use「よろしくお願いします」(yoroshiku onegai shimasu) which contains elements of both "please" and "thank you", and is often used to make requests and thank someone in advance for something.