http://www.medications.com/effect/view/30887 My son (27 months old) has been taking Singular for about a month and a half now to treat his asthma. His asthma is doing great, but since he started taking Singular he has been having awful nightmares. At the suggestion of his doctor we started giving him Thu, 29 May 2008 06:09:25 -0400 http://www.medications.com/effect/view/30887?item=8686 we have all struggled with this ,there is no doubt this med did its job, but the side effects are brutal,thats what makes me crazy about merck,instead of dening these side effects exist why not try to find out why this is happening so it can help.good luck http://www.medications.com/effect/view/30887?item=8686