Asthma
"Perscibed this to help with asthma flaring up at night, but now I use it to control my exercise-induced asthma. Take this 2 hours before exercise, it&#039;s like magic. Now I walk, jog, even run 2+ miles a day, and for someone who couldn&#039;t even walk for an extended time without their asthma flaring, that&#039;s a big deal. When I took this near bedtime, and only near bedtime, I experienced weird/vivd dreams. I actually enjoyed it, but the experience may be much more scary for others, beware taking near bedtime if you&#039;re concerned. Also, I&#039;ve been feeling depressed and irritated often. I&#039;ve had dark  thoughts, I&#039;m not sure it&#039;s from Montelukast or from outside factors. I&#039;ve had these feelings before taking it, it&#039;s just more often now."