Faded away symptoms and conditions

I was on Singulair for a few years. I started seasonally and eventually stayed on it all year. It kept my mild asthma and seasonal allergies completely in control to the point where I no longer felt like I had those problems. Even after cold viruses, my peak flows never dropped as far and it didn't take as many weeks to recover peak flow. As a singer, that was very important to me.
Then I spent a year barely able to walk from the severe leg cramps and pain and swelling. My GP was stumped and I had several diagnostic and blood tests that ruled out all the possibilities she could think of. Then I called up Glaxo and asked if it could be the Singulair? Yes, in rare cases it causes edema and/or muscle cramps. My doc took me off and the problems faded away and I'm back to walking. But now my asthma is not doing as well back on the older drugs. Sigh.

I took this before going to the movies. Halfway there I could barely drive. The streetlights were glowing in a strange way. My heartbeat felt strange and my face itched. By the time I parked my car and ran towards the box office (late), I felt like I was floating. In the theater I saw people in front of me, talking. They faded away because they were not really there. I felt horrible, I felt dizzy and the floor was spinning. I stumbled to the bathroom and almost threw up but couldn't. I dragged myself to the counter and bought a soda, which tasted horrible but which I forced myself to drink. I was gasping and the world was spinnning. All in all it was a hellish experience. I will never take this drug again. It also did not get rid of my neck pain.