Sir, I am 60 years old, having allergy problem, I consulted pulmonologist & ENT specialists, MRI scan also done no abnormalities found, I am getting some time non stop sneezing, cough, uneasiness in breathing, earlier it was happening two or three times in 8 days. Now its frequency is increased almost daily. For that I took till now from the last 3 years Tab Fexolfenadine hydrochloride 120mg, Montelucast 10mg,& LevocetrizenDihydrochloride, Sabutamol, Atarax 25mg and with nose spray of furamist AZ, now if I take Tab Montelucast 10mg then I will be feeling alright, how long I have to depend on this tablet? if taken prolong is it not effecting to my health? is there any permanent cure is possible to my problem please guide me what I do. I don't have Bp, sugar or any other problems, my weight is 70 kg.