I am all of a sudden developed a kind of asthma for the last 1 1/2 years. Before that, i have occasssionally epxerienced wheezing but not like an asthma. So, now here Doctor advised me to go for Singulair (montelukast sodium 10mg) for a long time like almost a year I am taking now. But, if I stop taking the medicine Montelukast sodium 10mg, in a couple of days, i start wheezing again. I am not sure how long i have to take this. I dont get a clear answer. I am a man, and my age is 37 and 165cm tall. Kindly suggest.