My 4.5-year-old son has been suffering from loose motion (2–4 times/day), vomiting (1–2 times/day), occasional middle chest pain, low appetite, and mild weakness for the past 3 days. He’s been prescribed Lanspro 15 (empty stomach), Aglozyme C (twice daily after food), Regutol Mini (once daily), and ORS. However, there’s little improvement, and symptoms persist—especially loose stool and chest discomfort. Could this be a viral infection or food-related issue? Should we consider any change in medication or further investigation? Kindly suggest the next steps for diagnosis or relief. Thank you.