
The number of persons in the United States who take prescription opioids for pain is growing. Sullivan and colleagues2 found that from 2000 to 2005 there was a 19% increase in the number of patients who received prescriptions for opioids to manage chronic noncancer pain conditions. Based on a survey conducted from 1998 to 2006 with more than 19,000 subjects, Parsells Kelly and associates3 reported that 2% of the US population 18 years and older legally used opioids as analgesics at least 5 days per week for 4 or more weeks-and that another 2.9% used these drugs less frequently.



