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.
They also put a device on your eye to keep you from blinking. The reason that they do not put you to sleep is because you may go into REM (rapid eye movement) and your eye would involuntarily move. Source(s): Been there, done that. Yes you are awake during laser eye surgery. There is an instrument called a speculum that keeps the eye open and keeps it from blinking. You don't feel a thing...topical numbing drops are put in prior to surgery (they last 15 mins) and continued during the surgery to make sure it is definitely numb.