Asthma, Maintenance
"My 4 year old son was on this for a year.  It worked wonders for his asthma but made him a very violent and aggressive child.  We didn&#039;t notice the changes in his behavior until he had been on it for over 6 months.  His fits of rage became more and more frequent.  We finally decided that we would take him off to see if the Singulair was the cause.  We noticed changes in him the first day he was off of it.  He is back to being my sweet and loving child with no rage and no violence.  It is a great drug for those that don&#039;t have this side effect."