 Muscle relaxants are frequently employed during anesthesia. These medications may be employed to facilitate tracheal intubation, mechanical ventilation or to allow better surgical access. All muscle relaxants act at the neuromuscular junction. Based on the mechanism of action, two kinds of muscle relaxants have been defined1. Nondepolarizing muscle relaxants are competitive antagonists of the neurotransmitter acetylcholine Ach at the neuromuscular junction. The second kind of muscle relaxant is the depolarizing muscle relaxant and succinylcholine is the only muscle relaxant in this class that is clinically used. The mechanism of action of succinylcholine is less clear. Succinylcholine appears to mimic the actions of acetylcholine but results in a longer duration of depolarization of the post synaptic membrane1. 