<prompt> An opioid which is an anti tussive action is?DextromethorphanOxeladinCodeineNarcotine  <response>: ANSWER: C Codeine REF: KDT 5th ed p. 197ANTITUSSIVESOpioidsNon opioidsCodeinePholocodieneNoscapine or narcotineDextrpmethorphanOxeladin chlorphdianol 