<s>[INST] hello doctor i need some help..!! frm past many years i use to get sneezing attacks,,runny nose ,ichy nose and some times shortness of breath with weezing,,.so around 2 or 3 months ago i told my symptoms to an e.n.t expert he told me m suffering frm allergies (dust allergies) and allergic asthma ...and he prescribed me 1 tablet of montair lc daily..i start taking it daily...it controlled my symptoms..nw the problem is m not able to stop taking montair lc,,if i miss a single dose my symptoms come back within 24 hours even worst thn before... nw i dnt knw wat to do,,will i have to take this tablet daily in my whole lyf??if yes thn is it safe to take daily??wat will be the side effects in future if i take montair lc dailly.... please give me advice what should i do? [/INST] Hello Paris, The optimal treatment for severe house dust mite allergy is long acting antihistamines like Allegra 180 mg once daily plus Flonase or alone nasal spray 1-2 sprays/nostril twice daily. Montelukast 10 mg can be added at night if there is asthma such as in your case.  Montage LC is a combination of montelukast and Levocetirizine that can be given in severe dust allergy. Montelukast has side effects though nothing very serious (such as nausea, vomiting, occasionally dizziness hence taken at night, Chat Doctor.  </s>