Drug Tests Show Pain Patients on Opioids Less Likely to Use Illicit Drugs
/By Pat Anson, PNN Editor
In an effort to reduce soaring rates of drug abuse and overdoses, many physicians have taken their pain patients off opioids and switched them to “safer” non-opioid drugs like pregabalin, gabapentin and duloxetine. Others have encouraged their patients to try non-pharmacological treatments, such as acupuncture, massage and meditation.
That strategy may be backfiring, according to a large new study by Millennium Health, which found that pain patients prescribed opioids are significantly less likely to use illicit drugs than pain patients not getting opioids.
The drug testing firm analyzed urine drug samples from 2019 to 2021 for nearly 55,000 patients being treated by U.S. pain management specialists. About 80% of the patients were prescribed an opioid like oxycodone or hydrocodone, while the other 20% were not prescribed opioids.
Millennium researchers say detectable levels of illicit fentanyl, heroin, methamphetamine and cocaine were far more likely to be found in the urine of non-opioid patients than those who were prescribed opioids. For example, illicit fentanyl was detected in 2.21% of the patients not getting an opioid, compared to 1.169% of those who were. The findings were similar for heroin, methamphetamine and cocaine.
“In all cases, we found that the population that was not prescribed an opioid was significantly more likely to be positive for an illicit drug than those patients who were prescribed opioids,” said lead author Penn Whitley, Director of Bioinformatics at Millennium. “(There was) a 40 to 60 percent increase in the likelihood of being positive if you were not prescribed an opioid.”
Illicit Drug Use By Pain Patients
What do the findings mean? Are pain patients getting ineffective non-opioid therapies so desperate for relief that they’re turning to illicit drugs? That’s possible, but the study doesn’t address that specifically.
Another possibility is that patients on opioids are simply being more cautious and careful about their drug use. Opioid prescribing in the U.S. has fallen by 48% over the past five years, with many patients being forcibly tapered or abandoned by doctors who feel pressured to reduce their prescribing.
“Unfortunately, a lot of people with chronic pain have learned that it’s a bit tenuous, that their doctors are feeling pressure, and if they want to maintain their access (to opioids), they need their PDMP (Prescription Drug Monitoring Program) and their drug tests to look the way they need to look, so their doctor can feel comfortable continuing to prescribe,” said co-author Steven Passik, PhD, VP of Scientific Affairs and Head of Clinical Data Programs at Millennium. “I do think they realize that they’re on a treatment and that access to it is not guaranteed.”
Preliminary findings from the study were released today at PainWeek, an annual conference for pain management providers. The findings mirror those from another Millennium study earlier this year, which found that pain patients have lower rates of illicit drug use than patients being treated by other providers.
“If your main way of protecting people in pain from getting involved in substance abuse is to limit their access to opioids, there’s at least a hint here that’s not the right approach,” Passik told PNN. “It’s not a definitive statement by any stretch of the imagination, but it’s an approach to patient safety that leaves a bit to be desired.”
Another recent study at the University of Texas also found that restricting access to opioids is “not a panacea” and may even lead to more overdoses. Researchers found that in states that mandated PDMP use, opioid prescribing decreased as intended, but heroin overdose deaths rose 50 percent.
“Past research has shown that when facing restricted access to addictive substances, individuals simply seek out alternatives rather than limiting consumption,” said lead author Tongil Kim, PhD, an assistant professor of marketing at University of Texas at Dallas. “In our case, we measured overdose deaths as a proxy and found a substantial increase, suggesting that the policy unintentionally spurred greater substitution.”