allergic rhinitis
"I have been taking Montelukast for about 5 years.  It's helped me considerably with my extremely severe Urticaria. It basically stopped the symptoms completely. Since my condition was so extreme I ignored the side effects of the drug for a long time. I have insomnia. I wake up every 2 hours and I have mad dreams. I've always been a big dreamer, but since under the influence of Montelukast all dreams are basically nightmares. I'm extremely agitated during the day. Everyone basically annoys me. It's a bit rough but I have it under control. I get low fever randomly and quite heavy night sweats, too.
I have now stopped taking it to see if my condition has improved so I can maybe sleep through the night again. Fingers crossed."