Singulair Side Effects: My 4 yr old son was recently put on singulair for his asthma. He http://www.medications.com/effect/view/42476 My 4 yr old son was recently put on singulair for his asthma. He went from being a little boy who settled straight down to sleep at night to a boy who was running around his bedroom very hyper and not being able to sleep at night. After a week of this we s Please report this to the FDA for they are still monitoring to do Mon, 22 Jun 2009 06:31:52 -0400 http://www.medications.com/effect/view/42476?item=20843 Please report this to the FDA for they are still monitoring to do a complete evaluation of this drug.Visit www.parentsforsafety.org Kate http://www.medications.com/effect/view/42476?item=20843