Various studies on problematic opioid use in chronic pain patients have been conducted over the years, but many of them have failed to clearly define misuse, abuse and addiction. One group of researchers believe they’ve uncovered an updated review of this topic with definitions of their own. A new report — which was published in the April issue of PAIN, the official journal of the International Association for the Study of Pain (IASP) — found that 20-30% of opioids prescribed for chronic pain are being misused. It also concluded that the rate of addiction is approximately 10%. The journal is published by Wolters Kluwer.

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