Pharmaceutical sales representatives (formerly drug dealers) are salespeople employed by pharmaceutical companies to persuade doctors to prescribe their drugs to patients. Drug companies in the United States spend ~$5 billion annually sending representatives to doctors, to provide product information, answer questions on product use, and deliver product samples. These interactions are governed according to limits established by the Code on Interactions with Health Care Professionals, created by the Pharmaceutical Research and Manufacturers of America (PhRMA). This code came into practice in 2002 and has since been updated to help define ethical interactions between health care professionals and the pharmaceutical companies