Ethchlorvynol,1-chloro-3-ethyl-1-penten-4-yn-3-ol (Placidyl), is a mild sedative–hypnotic witha quick onset and short duration of action (t1/2 =5.6 hours).Because of its highly lipophilic character, it is extensivelymetabolized to its secondary alcohol (～90%) prior to itsexcretion. It reportedly induces microsomal hepatic enzymes.Acute overdose shares several features with barbiturateoverdose.
