A recent investigation by ProPublica, Consumer Reports magazine and NPR radio found that from only seven drug firms that were questioned, 17,000 doctors and health care providers had taken money from these companies. They included AstraZeneca, Cephaton, GlaxoSmithKline, Johnson & Johnson, Eli Lilly, Merck and Pfizer. Over 380 walked away with over $100,000, and it’s all legal, most of the time not improper.
Dr. John Santa, director of the Consumer Reports Health Ratings Center commented, "The amount of money involved is astounding, and the ProPublica report's account of the background of some of the physicians is disturbing." ProPublica also found in state medical board disciplinary records that 250 doctors paid to speak had been sanctioned for inappropriate activities, some had even lost hospital privileges or were convicted of a crime.
See You Tube video on the subject, following.
Must reading on this subject here, here and here.