My son now age nine went off Singulair two years ago. He was one...

My son now age nine went off Singulair two years ago. He was one it for about a year and was having terrible nightmares. I did not realize why until he went off of it. A year later the doctor put him back on it. I forgot and was not quite sure it was the Singulair so we tried again. About 2 months later it started again. I quickly remembered and took him off. When I asked the doctor I was told it is a rare side effect. I am happy to see this site so others know and can become aware. My daughter however has been on it for years and had done well. We are trying to take her off though because she seems very nervous and anxious (more than typical). I want to see if the medicine makes a difference.