It seems that no amount of data-driven information can get policymakers to reconsider the hysteria-driven pain prescription policies they continue to put in place.
I can understand lay politicians and members of the press misconstruing addiction and dependency, but there is no excuse when doctors make that error. Yet National Public Radio reports that surgeons in 18 Upstate New York hospitals have agreed on an initiative to limit the amount of pain medicine they will prescribe to postoperative patients discharged from the hospital. The reporter says that researchers “now know” that patients prescribed opioids for postoperative pain “can become addicted” and that “the new prescription guidelines can prevent this particular gateway to abuse.”
But what does the research show? One recent study published in the BMJ of more than 568,000 “opioid naïve” postsurgical patients followed for 8 years found a total “misuse” rate of 0.6 percent. (“Misuse” includes a range of non-prescribed drug use, from self-medicating with leftover pills to treat an ankle sprain on one extreme to addiction on the other.) Broken down further, the researchers found the misuse rate was 0.15 percent in patients given just one prescription postoperatively and was 0.29 percent in patients who got a second prescription as a refill.
Multiple highly-respected Cochrane systematic analyses, the most rigorous reviews in the medical science literature, found the addiction rate in chronic noncancer pain patients on long-term opioid therapy to be around 1 percent.
Addiction and dependency/tolerance are two separate entities, but policymakers and many in the media equate the two. But the doctors in Upstate New York should know better. Physical dependence refers to the physiological adaptation to the drug such that abrupt cessation or tapering off too rapidly can precipitate a withdrawal syndrome, which in some cases can be life-threatening. Tolerance is an aspect of physiological adaptation, in which increasing dose of a medication become necessary to achieve the desired effect. Once a patient is properly tapered off of the drug on which they have become physically dependent, they do not feel a craving or compulsion to return to the drug. Dependence and tolerance are seen with numerous types of drugs, from anti-depressants and anti-epileptics to beta-blockers (used to treat hypertension and other cardiovascular conditions).
Addiction, on the other hand, is defined by the American Society of Addiction Medicine as a “chronic disease of brain reward, motivation, memory and related circuitry…characterized by the inability to consistently abstain, impairment in behavioral control, craving” that continues despite resulting destruction of relationships, economic conditions, and health. Addiction has a biopsychosocial basis with a genetic predisposition and involves neurotransmitters and interactions within reward centers of the brain. Some experts believe addiction is a learning disorder in which behavioral patterns are automatized as mechanisms for coping with stress or trauma. A major feature of addiction is compulsiveness. This compulsiveness is why alcoholics or other drug addicts will return to their substance of abuse even after they have been “detoxed” and despite the fact that they know it will further damage their lives.
Writing in the New England Journal of Medicine in 2016, Drs. Nora Volkow and Thomas McLellan of the National Institute on Drug Abuse explained, “Unlike tolerance and physical dependence, addiction is not a predictable result of opioid prescribing. Addiction occurs in only a small percentage of persons who are exposed to opioids — even among those with preexisting vulnerabilities.”