Maximum duration of action is seen with
Non-depolarising blockers : Long acting (>50mins) : d-Tubocurare, Pancuronium, Doxacurium, Pipecuronium. Intermediate acting (20-50mins) : Vecuronium, Atracurium ,Cisatracurium, Rocuronium . Sho acting (<20mins) : Mivacurium,Rapacuronium.
Atracurium
Rocurium
Pancuronium
Rapacurium
Muscle relaxants