"Dextromethorphan (DXM)" Dextromethorphan (DXM) http://www.cesar.umd.edu/cesar/drugs/dxm.asp Dextromethorphan (DXM) "Dextromethorphan (DXM)" Dextromethorphan (DXM) | CESAR "Dextromethorphan (DXM)" "Dextromethorphan (DXM) | CESAR" Dextromethorphan (DXM) "Dextromethorphan (DXM)" Center for Substance Abuse Research "Dextromethorphan (DXM)" http://www.cesar.umd.edu/cesar/drugs/dxm.asp Dextromethorphan (DXM) | CESAR high doses "Dextromethorphan (DXM) | CESAR" CESAR "Dextromethorphan (DXM)" http://www.cesar.umd.edu/cesar/drugs/dxm.asp first recognized as early as 1975 Dextromethorphan (DXM) | CESAR