Benzodiazepines and Pain
Benzodiazepines and Pain
Quick . . . name a class of prescription medications that, by most evidence, appears to be overprescribed and abused and the use of which has resulted in an increasing number of emergency department visits.
If you said “opioids,” you would be right. This is probably the answer most health care professionals would give. However, there is another response that is given much less frequently but would be equally true: benzodiazepines.
I wish I could say that this inattention to benzodiazepines is something new, but my personal experience indicates it is not. Twenty years ago, I coauthored one of the first papers that examined the use of benzodiazepines by patients with chronic pain and found that these agents were overprescribed.1 With rare exception since that time, the lectures I have attended on overprescription of medications have focused on opioids. When I have raised the issue of overuse of benzodiazepines, the speakers have either responded that they were unaware of any problem or offered the odd response that the audiences were interested in opioids, not benzodiazepines.
Two reports from the CDC indicate the scope of the problem with benzodiazepines. From 2004 to 2008, there was a 111% increase (going from 144,600 to 305,900) in the estimated number of emergency department visits involving nonmedical use of opioid analgesics.2 For the same period, there was an 89% increase (from 143,500 to 271,700) in such visits for benzodiazepines. Data from the National Vital Statistics System multiple cause-of-death file from 2010 show that opioid analgesics were involved in 75% of pharmaceutical overdose deaths; benzodiazepines were in second place, with involvement in 29% of such deaths.3 Benzodiazepines were also involved in 30% of opioid-related deaths—far more than any other class of drugs. This indicates that combining benzodiazepines and opioids may be especially dangerous.
Of course, patients who use prescription drugs for nonmedical purposes may be purchasing drugs illicitly, so it is difficult to determine how many of those in the CDC studies may have had prescriptions written for them by physicians. However, 2 studies on opioid prescriptions in the Department of Veterans Affairs health care system indicate that benzodiazepines continue to be frequently prescribed for patients with chronic pain.
In the first study, the authors found that 32% of patients taking what they defined as high doses of opioid analgesics for chronic noncancer pain and 25% of those taking what was considered a traditional dose of opioids for the pain were also taking a benzodiazepine.4 In contrast, only 10% of patients who were not receiving an opioid were given a prescription for a benzodiazepine.
The second study involved patients receiving methadone or a long-acting form of morphine for chronic pain. In this study, at least 28 days of a benzodiazepine had also been prescribed for 26% of the patients at the same time as they were taking the opioid.5