Main Entry: dex·tro·me·thor·phan

Pronunciation: \ˌdek-strō-mi-ˈthȯr-ˌfan\

Function: noun

: a nonaddictive cough suppressant that is widely used especially in the form of its hydrobromide C₁₈H₂₅NO·HBr in over-the-counter cough and cold preparations and is a codeine analog of levorphanol lacking the analgesic properties of codeine and producing little or no depression of the central nervous system