Physicians who are concerned with the administration of anesthesia and then the condition of the patient who is under anesthesia: "An anesthesiologist uses a drug or a gas to cause the loss of bodily sensations with or without loss of consciousness."

"Anesthetics that are administered by anesthesiologists which can affect the whole body by making the patient unconscious are called general anesthetics and anesthetics that make a person have no feeling in only a specific part of the body are called local anesthetics."