Wow! I can't believe what I'm reading. My son just turned 5 years old. He was put on Singular when he was 2 years old because he constantly had sinus infections. For the past year, I've just used it off and on when he starts to get stuffy. He is very well behaved, but has has trouble with nightmares. He just told me a few weeks ago that he knows that monsters aren't real, but he can't get them out of his head. I know people think I'm a softie because I let him fall asleep with me every night (his dad puts him in his own bed after he's fast asleep), but he is petrified to go to sleep by himself. I didn't understand it, but I could see the terror in his eyes. It all makes sense, now. Sometimes he plays so well by himself in his room, but other times he doesn't even want to go to the bathroom by himself because he's scared. I'm betting he was taking Singulair during the times he was scared to go into the bathroom himself. Unbelievable. We have to get the word out about this drug. I feel like such a horrible parent for not searching for these side effects sooner.
I came to the website to see if Singular suppressed the immune system because he's been getting horrible cold sores in the fall for the past 3 years. It seems to correspond with the time he started taking Singular. I know that Singulair can't cause cold sores, but if his immune system was suppressed, his body can't fight off the virus. 80% of us have the virus that causes cold sores, but most of our immune systems are able to keep the virus in check. During a cold or other illness which compromises the immune system, cold sores can pop out.
In any case, I've already flushed the remainder of his pills. He's also complained of stomach and leg aches. In fact, the docs made him give-up milk thinking he was lactose intolerant but it didn't help the stomach aches. Hopefully giving-up Singulair will help his tummy aches, too.