Induced asthma symptoms and conditions

My 6 year old son was on Singulair for 2 months for viral induced asthma. After about 2 weeks we started noticing that angry tears were pouring out of him about minor problems - his brother didn't want to want to watch the same TV show as him, etc. By 2 weeks later he had started having daily major meltdowns, yelling that he didn't love us and never had, refusing all physical affection and calling himself a loser. This was behavior we had never seen from him before. After a month of this, we were really beginning to think that he either had a mental illness or was having a nervous breakdown. There was a wild look in his eye, and it was obvious that his behavior was confusing him, too, but he was powerless to stop it. My husband had the insight to check the Singulair side-effects the evening of a particularly bad day and we pulled him off immediately. The next day I talked to an acquaintance whose normally laid back and happy 7 year old had started saying he wished he were dead after 3 months on Singulair!

The "edge" my son had to him while on Singulair that made us think of mental illness went away almost immediately after taking him off Singulair. He was still quite irritable and quick to tears for two more weeks, but right now he's been off 3 weeks and I think we have our son back.

UPDATE: Our nightmare with SINGULAIR has not ended! After reading "conerned citizens" report discussing the possiblility of Singulair causing asthma blew me away. My son was put on this drug for food allergies not asthma b/c they thought of his two anaphylaxsis episodes in 5 days. 1 food related the other unknown (maybe outdoor mold?) He had no prior issues with breathing.

He has been off of it for almost 2 weeks however over the last week he has slowly developed some breathing issues. After getting off of it, he still has his ear infection from the second day of being on it and last Friday after playing some basketball began to seem like he was winded so I brought him in. He was having trouble breathing. I called the Dr. and he said it could be excercised induced asthma. He is a very active boy who runs non stop and has NEVER had breathing issues before Singulair! It seemed to pass after a few hours. The next fews days he coughed a few times when playing and I thought what the heck is happening to him. Monday at school they didn't go outside so he was fine b/c he didn't run around. Tuesday, they came to get me b/c he was having trouble breathing and one of his teachers whose son has asthma said I think you better give him an inhaler. I called the Dr. ASAP and he approved us to borrow another child's. He freaked out and wouldn't let us give it to him. After 2 epi-shots in the previous weeks, he wanted nothing to do with that. At school the next day, we made him take the inhaler if he wanted to go out to playso he did. He didn't cough but a few times. No excercise at all. Then last night, he got really bad. He started to cough and couldn't stop to the point of gaging and it seemed as though he had developed a ton of phlem and kept trying to swallow. We ended up in the ER where we were told that he has asthma! I am so furious! I don't get this at all! If this report is accurate and my son got asthma by going on it - this will be devastating. We kept him home today from school and took him into the Dr. b/c he continued to cough all night. He is now on Flovent, Albuterol and has an enebulizer. I'm probably the only one of all of us who child did not have asthma to begin with.

Has anyone who did not have asthma before singulair now have any issues? Please let me know!