Sorry, I'm feeling sorry for myself. Asthma nurse put me on Montelukast tablets as I was struggling with coughing fits at night. I've only taken 6 so far & each day I feel more & more yuk! Can't get to sleep because of them, then get up feeling awful. Dizziness, nausea, dull headache, feeling generally terrible. I'm trying hard to keep up with my swimming, but this morning had to give up due to severe nausea. It's now teatime & could barely eat anything. I'm in two minds as to whether I should stop the asthma tablets. I can't get hold of asthma nurse until next week, so can't phone for advice. These are mentioned as side effects, however I hate feeling so sick.