Several factors increase our chances of developing a heat stroke such as when the outside temperature and humidity are high, you are not in shape, you take certain medications or are sick or dehydrated. Aspirin does not keep your temperature from rising during exercise because aspirin lowers fever by making you sweat. When exercising intensely, you may already be sweating at your maximum and not be able to increase your sweating. So taking aspirin will not increase sweating and your temperature can rise even higher.
To keep patients calm immediately before the procedure, a barbiturate may be used. During surgery, a combination of paralytics-drugs that paralyze the muscles of the body, and drugs that cause unconsciousness are used together. Isoflurane.
Barbiturates have been used for many years to put people to sleep at the start of an operation (often called 'induction'). Propofol is a newer non-barbiturate short acting anaesthetic induction drug which, due to its rapid onset of action and short recovery period, is ideally suited for endoscopy sedation.