General anesthetics 

General anesthetics are medicines that render a patient reversibly unconscious and unresponsive in order to allow surgeons to operate on that patient. General anesthetics are normally administered intravenously or by inhalation by a specialist doctor called an anesthetist who also monitors the patient’s vital signs (breathing, heart rate, blood pressure, temperature) during the procedure. While under general anesthesia, a patient is unable to feel pain and will likely wake with some short-term amnesia (memory loss). Experts are unsure exactly how general anesthetics work.

A general anaesthetic is used for many different types of operation (surgery) or procedure. It’s done so that during the procedure: you’re asleep (unconscious) you do not feel any pain. you’re not aware of what’s happening.

There are four stages of general anesthesia, namely: analgesia – stage 1, delirium – stage 2, surgical anesthesia – stage 3 and respiratory arrest – stage 4.