My daughter has moderate asthma. She has been on Singulair for about 4 years. My experience with it is excellent. I’d swear by it. Prior to taking it she was very susceptible to getting pneumonia. Since she has been taking it regularly she has not come down with pneumonia.
It’s a matter of the benefits outweighing the risks.
For me it didn’t make any difference. It it’s helping that much, got for it. There’s nothing worse than not being able to breathe.
I'm a Pediatric RN in a large practice, and our experience has been that it either works or it doesn't; there seems to be no in-between. Our experience with my son has been similar; he used to have several asthma flare ups a year, and since starting it, he has maybe one a year, and hardly ever needs oral Prednisone anymore.