Hi some advice needed. My son (12) was diagnosed with cough variant asthma and dust mite allergy after a viral infection in January. However the only thing to work is Montelukast. Inhalers don’t make a difference at all. He has no chest tightness, wheezing etc Just a cough. We decided to take him off the Montelukast and everything was fine for 3 weeks. Now he has had a stuffy nose, sore throat and cough is back (3 days). Should I put him back on the Montelukast or is there anything else I could try? The reason we stopped Montelukast was for behavioural issues. Many Thanks