Drugs are composed of different kinds of chemicals. these drugs could be useful if it used as it is being prescribed by a doctor because it will help to destroy harmful microorganism if it is an antibiotic or it may correct physiological disorders in the body this will become harmful when one uses it without prescription because it might not be good for that person or the person might develop allergic reaction, another reason is that the person using it might be abusing its use just like the prohibited drugs. And in the case od antibiotics taking these especially without completing the prescribed number does not totally destroy the microorganism instead they become resistant to it and if ever it becomes habitual taking of antibiotic and not finishing it this will then eventually produce a superbug a superbug is a microorganism that has become resistant to different kinds of antibiotic therefore they not easily destroyed so doctors will have difficulty in helping those patient with this kind of microorganism,