Cancer survivors more likely to be prescribed opioids even years later, study finds

The rates were higher even 10 or more years following cancer diagnosis.

To find out whether very long-term cancer survivors and those who never had cancer were prescribed opioids differently, researchers at the University of Toronto looked at more than 17,000 adults, which included more than 8,600 adult cancer survivors. They compared the group of cancer survivors to others who had never had cancer, but were the same gender and roughly the same age, and found that the cancer survivors were more likely to be prescribed opioids, even up to 10 or more years following their cancer diagnosis.

It’s an important and surprising finding about cancer survivors, according to lead researcher and author of the paper, Rinku Sutradhar, of the University of Toronto’s Department of Biostatistics.

"We thought opioid prescription rates would be similar because we had no reason to believe it would be higher," she said. Sutradhar added that the findings suggest that those making the transition from cancer patients to cancer survivors should keep their new treatment team informed of their opioid use thus far.

"Once you attain survivorship you’re now receiving care form your primary care doctor rather than the oncologist," she said. "During that switch, it would be advisable to inform your primary care physician about everything you experienced, what opioids you took before."

Other experts in the field agreed that the study touches on an important challenge in treating people with chronic pain.

"This article highlights a dilemma about those long-term survivors who are on chronic opioids, and maybe we should take a harder look at them in terms of pain management," said Dr. Charles Shapiro, director of cancer survivorship at the Tisch Cancer Institute at the Icahn School of Medicine at Mount Sinai, who was not involved with this study. "But we often don’t have the resources to take that harder look."

But, he added, it is important not to discount the usefulness of opioids for helping cancer patients manage serious, sometimes debilitating, pain.

"Cancer patients have pain and they take opioids," he said. “We can’t lose the message that opioids are indicated for that group with chronic pain and they work well."

Managing the dosage of opioid prescriptions as years pass after cancer survival is important.

"These are survivors and, although they may have pain, when you’re this far out, they become more like the general population," Shapiro added.

But for many cancer survivors, the return to normalcy is never quite complete. They are often left to deal with a variety of long-term consequences after cancer treatment, which can affect cognition, the heart, bones and the digestive system. Chemotherapy can leave lasting effects on the body; scars and pain are just a few possible complications after surgical treatment; and the psychological effects that can be difficult for patients and their loved ones.

Alexa Mieses, M.D., M.P.H., is a family medicine resident at Duke University.