One way of stopping someone from sleeping is by drinking of coffee. For every student, businessman or businesswoman often drinks coffee during their break time to be relieved from stress and to stay awake from work. People enjoy drinking it for its taste and the relaxation one can get from it. However, too much intake causes side effects that might be harmful to people. One of these effects is that it sometimes affects our hearts. But it can still be avoided when one can drink moderately. Despite its effects, it still has many advantages.