Here is the English translation of the provided text: A 15-month-old child with a stomach flu, what medicine is best to take? Note: The line breaks ("，") were kept as they were in the original text.

Patient's question:

Vomiting, diarrhea, (poor mental state, poor appetite, diarrhea, weight loss) Onset date: February 18, 2010, cause unknown

Doctor's answer:

It should be diagnosed clearly before applying medication.