Atracurium besylate is a neuromuscular-blocking drug or skeletal muscle relaxant in the category ofnon-depolarizing neuromuscular-blocking drugs, used adjunctively in anesthesiato facilitate endotracheal intubation and to provide skeletal muscle relaxationduring surgery or mechanical ventilation.The drug atracurium besylate can be used most advantageously if muscle twitch response to peripheral nerve stimulation is monitored.