Not Convinced That Drugs Are Poisons And Cause Most Disease? Then Read:

Over Dose: The Case Against the Drug Companies: Prescription Drugs, Side Effects, and Your Health by Jay S. Cohen M.D.:
http://www.amazon.com/exec/obidos/ASIN/1585421235

Bitter Pills: Inside the Hazardous World of Legal Drugs by Stephen Fried:
http://www.amazon.com/exec/obidos/ASIN/055337852x