A patient with dislocated jaw was given a short-acting muscle relaxant by a doctor. Name this drug:

Answer options

1. Cytitonum (Cytisine)
2. Dithylinum (Suxamethonium chloride)
3. Procaine
4. Papaverine hydrochloride
5. Pyridostigmine hydrobromide

Explanation

Muscle relaxants1. Non-depolarizing muscle relaxant:• Tubocurarine (Curariform)Mechanism: blockage of N-cholinergic receptors of the synaptic membraneAntidote: Proserin (Neostigmine)2. Depolarizing muscle relaxant:Curarelike Dithylinum (Suxamethonium)Mechanism:Over-depolarized N-cholinergic receptors =Muscle is overstimulatedThen, muscle desensitize (muscle desensitization).That’s why it cause muscle contraction at the beginning.Antidote:Acetylcholinesterase by blood transfusion