My 4 yo daughter has been taking Sinulair since last spring (Apir...

My 4 yo daughter has been taking Sinulair since last spring (Apirl 2006). Worked great, I don't remember any side effects last summer. She was 2 & changed every day so it's hard to say. Now she's 3 & we've started it back up again at the start of spring. It's hard to say for a 3 year old what symptoms/side effects they are really suffering from. They aren't able to express themselves except mostly by actions. I just assumed her moodyness, crying jags, trouble sleeping at night were part of her age/personality. Now, I'm noticing a definate problem getting her to bed every night. She will easily be up until 10 - 10:30 before falling asleep. This is even if I put her to bed around 8. She doesn't sleep well either. I'm pretty sure she's dreaming, but it's hard to say whether or not she's having nightmares. We've already made an appt with another doc to switch to something other than Singulair. Too bad this type of info has to be sought after by the patient's & not provided at the time the medication is prescribed. I'll have to do more research regarding the physchotropic issues of this drug. They prescribe this for kids?