One of the most challenging topics of ethics in sport is the problem of "doping" by the usage of improper methods and materials of doping. In order to draw a valid conclusion, the paper attempts to evaluate and criticize the pros and cons' evidences of doping taken from internet sites, different papers and Islamic resources. The derived conclusion indicates that despite of bringing about a state of pondering, the pros' evidences of doping cannot resist against the cons'. From the viewpoint of applied ethics and also of Islam's, doping is an incorrect method of increasing the athletes' efficiency. Islam's ethical point of view could be described based on Islamic resources and clear principles that the paper undertakes.