###Human: Why are there recurrent episodes of allergic cold? ###Assistant: Hi. Give him Allegra M (Montelukast and Fexofenadine) tablet for a week in the evenings. This medicine is better than others as it produces the least sleep. This will help him read well. Keep away from dust, smoke, fumes, perfumes, mud, pollution, direct air-conditioning, etc. After his exams are over, note down whenever he gets allergy and that way you may be able to find the offending agent. Allergy cannot be cured. It can only be prevented and kept under wraps. To detect the allergen one must do a skin prick allergy testing.