Our 2 yr old son was prescribed Singulair for allergies by his EN...

Our 2 yr old son was prescribed Singulair for allergies by his ENT. He did great for a month. then started waking up more often at night, talking in his sleep. Never a fussy child unless he was sick- suddenly whining, protesting, acting out of character. Screaming when he didn't get his way. I threw away the pills the night he woke with a blood-curdling scream climbing the walls in his room- hallucinating that there were bugs crawling in his room. His pupils were dilated, heart was pounding and he was scared to death. A friend warned me early on, told me of her daughters behavior problems from the drug and told me of this website. She is doing great on Allegra. My son was to go off the Singulair in a couple weeks of our stopping the drug anyway, hoping he wont need any further treatment.