what does hydroxyzine pam mean
â¢ HYDROXYZINE (noun). The noun HYDROXYZINE has 1 sense: 1. a drug (trade names Atarax and Vistaril) used as a tranquilizer to treat anxiety and motion sickness. Familiarity information: HYDROXYZINE used as a noun is very rare.ypernyms (hydroxyzine is a kind of...): antianxiety drug; anxiolytic; anxiolytic drug; minor tranquilizer; minor tranquilliser; minor tranquillizer (a tranquilizer used to relieve anxiety and reduce tension and irritability).