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Levodropropizine is a cough suppressant. It is the levo isomer of dropropizine or (S)-3-(4-Phenylpiperazin-1-yl)propan-1,2-diol. It acts as a peripheral antitussive, with no action in the central nervous system. It does not cause side effects such as constipation or respiratory depression which can be produced by opioid antitussives such as codeine and its derivatives. It carries lesser somnolence as racemate.