I am so glad I looked up the side effects of this drug and that I...

I am so glad I looked up the side effects of this drug and that I'm not imagining things! I've also been taking Singulair and Zyrtec over the past two years for chronic hives and have gained a tremendous amount of weight. In addition, I have experienced trouble sleeping, terrible nightmares, daytime grogginess and am much more impatient than when I don't take the medication. I work out like crazy and never had a weight problem until I started taking this drug. No more!