Malignant hyperthermia (MH or MHS for "malignant hyperthermia synrome", or "malignant hyperpyrexia due to anaesthesia") is a rare life-threatening condition that is triggered by exposure to certain drugs used for general anaesthesia (specifically all volatile anaesthetics), nearly all gas anaesthetics, and the neuromuscular blocking agent succinylcholine. In susceptible individuals, these drugs can induce a drastic and uncontrolled increase in skeletal muscle oxidative metabolism which overwhelms the body's capacity to supply oxygen, remove carbon dioxide, and regulate body temperature, eventually leading to circulatory collapse and death if not treated quickly.