Suxamethonium chloride

Suxamethonium chloride, also known as suxamethonium or succinylcholine, is a medication used to induce muscle relaxation and short-term paralysis, usually to help with tracheal intubation. It is sometimes used in combination with pain medications and sedatives for euthanasia and immobilization of horses. It is colloquially referred to as "sux" in hospital settings.