https://blogs.mercola.com:443/sites/vitalvotes/archive/2004/07/06/No-Surprise-Cough-Medicines-Found-Not-Effective.aspxIt's not surprising that two active ingredients found in many over-the-counter cough medicines--dextromethorphan and diphenhydramin--are no better than a placebo for nighttime cough and sleep quality in children with upper respiratory tract infectionsenCommunityServer 2008.5 SP1 (Debug Build: 31106.3070)