Your son has had a cold recently and probably a virus chest infection with the cold and he still has a loose cough. Some of his symptoms are due to asthma especially when he coughs with laughter and when he gets upsest. He should definitely be using his Flixotide. Use 2 puffs of Flixotide twice daily. He should also be using his Nasonex nasal spray once daily and the Zyrtec syrup at night.
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