My 5 year old son was having problems constantly with his seasona...

My 5 year old son was having problems constantly with his seasonal asthma. His Dr. put him on Singulair and after about a week he made significant improvement and could even run and jump on the trampoline again and then on the 2 week mark, every morning he would get out of bed crying with severe leg pain in both legs and then he went from my sweet spirited, always sharing his things, wanting to play with everyone and make new friends, to cranky, moody, whiney, selfish and sleepy all of the time. He then started complaining of dizzy spells with vision changes such as not being able to see at all when he gets dizzy. His doctor said he needs to see a neurologist but I think it is all caused by Singulair and the doctor made me feel like a bad mother for wanting to take him off of it. he said the side effects would pass. This morning I watched a couple on the news who's son committed suicide after starting Singulair and they were talking about the mood changes, etc. I took all of my sons Singulair and threw it out. Now, I feel like a bad mother for letting the doctor talk me into keeping him on it. I am hoping that he gets back to normal within the next couple of days and I can cancel the appt. with the neurologist.