<s>[INST] my two kids one girl-3.5yr old,13kg and anther boy-2yr od,10kg- are frequntly suffering from cough and cold fever .they are taking antibiotics in evry month for their dieases.regularly taking antiallergy(nukast 4mg or montair 4)in every 6 months for a longer duration.we are living in adusty industrial area.i tried every alternatives but faied.what to do? [/INST] Hello, Both of them are definitely suffering from persistent rhinitis/rhinosinusitis that is a risk factor for development of asthma. Montelukast is a good choice for the lung and for exercise induced asthma but allergy testing is required to ensure you are aware of exactly the allergens your kids are sensitized to, example house dust mite or animal dander or molds. Precaution works a long way in preventing exacerbating allergies and long acting non sedating antihistamines plus nasal corticosteroids prevent ongoing nasal inflammation and subsequent asthma. Thanks. </s>