Facial swelling after starting new medicines can be a reaction to the drugs, even if your ECG is normal, and it should not be ignored. Do not take extra doses, keep track of swelling, and avoid any new medicines or foods that may worsen it. Stay calm, monitor for symptoms like breathing difficulty, rash, or increasing swelling, and keep yourself hydrated. Stop the suspected medicine only after medical advice and consult a doctor urgently to review your treatment and ensure safety.