<prompt> What is mechanism of action of Curanium drugs as muscle relaxant?Persistently depolarizing at Neuromuscular junctionAct competitively on Ach receptors blocking post-synapticallyRepetitive stimulation of Ach receptors on muscle end plateInhibiting the calcium channel on presynaptic membrane  <response>: Candocuronium iodide is an aminosteroid neuromuscular-blocking drug or skeletal muscle relaxant in the category of non-depolarizing neuromuscular-blocking drugs. Acts on Ach receptors competitively post-synaptically blocking them. Potential adjunctive use in anaesthesia to facilitate endotracheal intubation provide skeletal muscle relaxation. Candocuronium demonstrated a sho duration and a rapid onset of action, with little or no ganglion blocking activity, and it was only slightly less potent than pancuronium REF : WILLEY 10 TH ED 