My 8-year-old son started on Singulair 6 weeks ago. Soon afterwa...

My 8-year-old son started on Singulair 6 weeks ago. Soon afterwards he had severe problems falling asleep--often up until 4 or 5 am before drifting off, but I didn't make the connection. (Thank goodness it's summer time and no school!) About 2 weeks ago, my doctor recommended Singulair for me, too. The first day I was unbelievably sleepy, but after that I, too, have had severe problems with insomnia. I have also noticed involuntary muscle twitching, restless leg syndrome, and my mind feels like it's turning to mush. I used to tutor statistics; now I can't even do basic multiplication! Scary! I have just thrown out both my son's and my bottle of Singulair. I hope stopping it will reverse this crap.