Risks from reactions to anesthetic medicines
Some anesthetic medicines may cause allergic or other abnormal reactions in some people, but these are rare. If you suspect you may have such a problem, you should tell both your surgeon and anesthesia specialist well before your surgery. Testing will then be arranged as needed.
A rare, potentially fatal condition called malignant hyperthermia (MH) may be triggered by some anesthetics. The anesthetics most commonly associated with malignant hyperthermia include the potent inhalation anesthetics and the muscle relaxant succinylcholine. For more information, see the listing for the Malignant Hyperthermia Association of the United States (MHAUS) in the Other Places to Get Help section of this topic.