Hi. Does anyone have any knowledge or experience of giving safe meds to a 5yo boy to help ease anxiety before a flight? To make him a little drowsy or sleepy. I've read that melatonin won't work because it's a daytime flight so his natural melatonin levels will be low, therefore giving melatonin won't be effective as it has to work alongside the body's natural melatonin levels ie at night time. Perhaps cough syrup or allergy medicine? Any advice please?