<prompt> Which neuromuscular blocker releases histaminePancuroniumAtracuriumVecuroniumRocuronium  <response>: Atracurium Bisquaternary ammonium Benzylisoquinoline ED 95 0.2 to 0.25mgkg Intubating dose- 0.5mgkg. Maintenance - 0.05 to 0.1mgkg Drug of choice in patient with renal and hepaticd dysfunction onset of action 3-5min 0.5mgkg duration of action 20-35min about 82 is bound to albumin triggers dose-dependent histamine release that becomes significant at doses above 0.5 mgkg 