<prompt> Cis atracurium is preferred over atracurium due to advantage ofRapid onsetShort duration of actionNo histamine releaseLess cardiodepressant  <response>: Most important advantage of cisatracurium is that it does not provoke histamine release, therefore it is preferred over atracurium.Onset of action is similar for both atracurium and cisatracurium, and cis-atracurim has longer duration of action. 