Succinylcholine is a medication commonly used as a muscle relaxant during surgical procedures. It works by blocking the transmission of nerve impulses to the muscles, leading to temporary paralysis. This effect is particularly useful for intubation, where a tube is inserted into the airway to assist with breathing. The drug acts quickly, usually within a minute, and its effects last for a short duration, making it ideal for brief medical interventions. However, succinylcholine can cause side effects, such as muscle pain and increased potassium levels, so it is important for healthcare providers to monitor patients closely during its use.