Aspirin, one of the first drugs to come into common usage, is probably the most widely used drug in the world. Approximately 35,000 metric tons are produced and consumed each year, enough to make over 100 billion standard aspirin tablets. It is estimated that over one trillion aspirin tablets have been consumed in the past 100 years. Each year over 60 billion aspirin tablets are taken worldwide with Americans consuming 34 billion of those tablets. Presently, aspirin is most frequently prescribed for the prevention of heart disease. According to the Center for Disease Control, over 50 million Americans take aspirin for the prevention of heart disease. This accounts for about 350 million dollars in annual sales. It is estimated that in the next ten years, medical doctors will recommend that an additional ten million Americans should begin taking aspirin on a daily basis..