Suxamethonium

Suxamethonium chloride (INN), also known as suxamethonium or succinylcholine, is a nicotinic acetylcholine receptor agonist, used to induce muscle relaxation and short-term paralysis, usually to facilitate tracheal intubation. Suxamethonium is sold under the trade names Anectine and Quelicin. It is used as a paralytic agent for euthanasia/immobilization of horses. It is colloquially referred to as "succs" in hospital settings.