Suxamethonium chloride, also known as suxamethonium or succinylcholine, is a medication used to cause short-term paralysis as part of general anesthesia.[1] This is done to help with tracheal intubation or electroconvulsive therapy.[1] It is given either by injection into a vein or muscle.[2] When used in a vein onset of action is generally within one minute and effects last for up to 10 minutes.[2]