By Pat Anson, PNN Editor

For well over a decade, addiction treatment providers and public health officials have been touting the benefits of buprenorphine, an opioid that can treat both pain and addiction. When combined with naloxone in drugs like Suboxone that treat opioid use disorder (OUD), buprenorphine reduces cravings for opioids and lowers the risk of abuse.    

But a new study published in JAMA Network Open suggests that someone is far more likely to misuse buprenorphine than other opioids. In fact, the misuse rate for buprenorphine is over two times higher than misuse rates for hydrocodone, oxycodone and other opioid pain medications.

Researchers at the National Institute on Drug Abuse and the Centers for Disease Control and Prevention conducted the study, looking at data from nearly 215,000 people who participated in the National Surveys on Drug Use and Health from 2015 to 2019.

Respondents were asked if they misused prescription opioids “in any way that a doctor did not direct you to use them.” If they used someone else’s prescription or took opioids in greater amounts or more often than they were told by a doctor, that was considered “misuse.”

Researchers crunched the numbers and found that the vast majority of people do not misuse opioid pain medication and take it as directed. Oxycodone, for example, was misused by 12.7% of respondents who took it, followed by hydromorphone (11.8%), hydrocodone (11.6%), and prescription fentanyl (11.5%). Tramadol (7.8%) was misused the least.  

Addiction treatment drugs were misused the most. Buprenorphine was misused by 29.2% of the people who took it, followed by methadone at 22.2 percent. It’s not uncommon for someone getting OUD treatment to have relapses, so perhaps that finding is not altogether surprising.

Although buprenorphine is misused at a rate over two times higher than other opioids, researchers chose to focus on the positive: a recent downward trend in buprenorphine misuse, despite increases in the number of patients receiving buprenorphine treatment.

“In 2019, nearly three-fourths of US adults reporting past-year buprenorphine use did not misuse their prescribed buprenorphine, and most who misused reported using prescription opioids without having their own prescriptions. These findings underscore the need to pursue actions that expand access to buprenorphine-based OUD treatment, to develop strategies to monitor and reduce buprenorphine misuse,” researchers concluded.

What Is Misuse?

Every study has its flaws, and this one is no exception. Findings based on self-reported survey results are subject to poor memories, recall bias and concerns about stigma. The researchers’ broad definition of “misuse” could also result in a diagnosis of OUD when none actually exists, according to a pain management expert.

“It is not really clear what any of the data means clinically because of the very broad definition of the word misuse,” said Lynn Webster, MD, Senior Fellow at the Center for U.S. Policy (CUSP) and Chief Medical Officer of PainScript. “Behavior of taking an extra pill to control pain, despite it not being specifically directed by the prescribing provider, could be described as ‘misuse.’ This is not necessarily harmful, even if it is inappropriate. The implication is that simply taking an additional pill is an indication of OUD behavior. That would not be an appropriate characterization of the behavior. 

“In fact, the authors report the most common reason to misuse medication is to relieve pain in the OUD and non-OUD groups. This may imply that most people who are misusing their medications are experiencing undertreated pain.” 

The JAMA study is not the first to report a high rate of buprenorphine misuse. The DEA’s 2020 National Drug Threat Assessment reported that buprenorphine is misused more often than methadone or hydrocodone, and that it was poised to replace oxycodone as the most commonly misused prescription opioid. Unlike the JAMA study, the DEA said the misuse of buprenorphine was increasing, not declining.