Drexel study: Misuse of pain medication is pathway to high-risk behaviors

July 22, 2011

PHILADELPHIA (July 22, 2011)-- A new study by researchers at Drexel University's School of Public Health suggests that abuse of prescription painkillers may be an important gateway to the use of injected drugs such as heroin, among people with a history of using both types of drugs. The study, published in the International Journal of Drug Policy, explores factors surrounding young injection drug users' initiation into the misuse of opioid drugs. Common factors identified in this group included a family history of drug misuse and receiving prescriptions for opioid drugs in the past. The results support a need for efforts to prevent misuse of prescription drugs, particularly during adolescence.

"Participants were commonly raised in household where misuse of prescription drugs, illegal drugs, or alcohol, was normalized," explains Dr. Stephen Lankenau, an associate professor in the School of Public Health and principal investigator of the study. "Access to prescription medications - either from a participant's own source, a family member, or a friend - was a key feature of initiation into prescription drug misuse."

In numerous cases, the desire to experiment with a prescription opioid drug (the common class of drugs that includes codeine and oxycodone), combined with financial incentives or pressures from friends to sell available quantities, resulted in escalated patterns of opioid misuse, according to the study.

Lankenau and colleagues also describe two key findings as evidence of an emerging dynamic among misuse of opioid drugs and the use of injection drugs. First, four of five IDUs misused an opioid before injecting heroin, in contrast to more conventional patterns of using opioids as a substitute drug after initiating heroin use.

Second, in nearly one out of four young IDUs in this study, a prescription opioid was the first type of drug they injected. Prescription opioids are rarely reported at initiation into injection drug use amongst young IDUs. All but two of these participants later transitioned into injecting heroin.

Opioid misuse is an important public health concern due to the increasing association of opioids with drug dependence and fatal overdose, and much research has focused on the factors affecting how and when people initially misuse opioids. However, descriptive data about initiation into prescription opioid misuse among young injection drug users are scarce.

To fill this gap, in this study researchers interviewed 50 young IDUs aged 16 and 25 years old in New York and Los Angeles, who had misused a prescription drug at least three times in the past three months, to study contextual factors leading to their use of opioid drugs. Participants were recruited in natural settings, such as parks, streets, and college campuses, during 2008 and 2009. A mixed-methods research design was utilized that collected both quantitative and qualitative data.

Additional findings and descriptors of the study population include:The authors conclude that prevention efforts, especially during adolescence, are needed, and that parents and guardians need to carefully monitor and safeguard all prescription medications, particularly opioids, within the household. Although households where drug use is normalized or where broader social or psychological problems exist are more difficult to remedy with prevention efforts or policy changes, future research examining prescription opioid misuse among a range of adolescents and young adults to better understand the contextual and environmental factors of drug use may yield additional solutions.
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The article was co-authored by Karol Silva (Drexel University); Michelle Teti (University of Missouri); Alex Harocopos (National Development and Research Institutes); and Jennifer Jackson Bloom and Meghan Treese (Children's Hospital Los Angeles).

Lankenau is also principal investigator of two studies evaluating the effectives of overdose prevention programs in Los Angeles and Philadelphia.

Lankenau is an associate professor in the Department of Community Health & Prevention at the Drexel University School of Public Health. He received his PhD and MA degrees in Sociology from the University of Maryland. He earned his BA in Sociology at the University of Vermont.

Drexel University

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