Rethinking Addiction as a Chronic Brain Disease
The message emblazoned on a walkway window at the airport in Burlington, Vt., is a startling departure from the usual tourism posters and welcome banners: “Addiction is not a choice. It’s a disease that can happen to anyone.” The statement is part of a public service campaign in yet another community assailed by drug use, intended to reduce stigma and encourage treatment. For decades, medical science has classified addiction as a chronic brain disease, but the concept has always been something of a hard sell to a skeptical public. That is because, unlike diseases such as Alzheimer’s or bone cancer or Covid, personal choice does play a role, both in starting and ending drug use. The idea that those who use drugs are themselves at fault has recently been gaining fresh traction, driving efforts to toughen criminal penalties for drug possession and to cut funding for syringe-exchange programs. But now, even some in the treatment and scientific communities have been rethinking the label of chronic brain disease. In July, behavior researchers published a critique of the classification, which they said could be counterproductive for patients and families.
“I don’t think it helps to tell people they are chronically diseased and therefore incapable of change. Then what hope do we have?” said Kirsten E. Smith, an assistant professor of psychiatry and behavioral sciences at Johns Hopkins School of Medicine and a co-author of the paper, published in the journal Psychopharmacology. “The brain is highly dynamic, as is our environment.”
The recent scientific criticisms are driven by an ominous urgency: Despite addiction’s longstanding classification as a disease, the deadly public health disaster has only worsened.
Almost no one is calling for entirely scrapping the disease model. Few dispute that constant use of stimulants like methamphetamine and opioids like fentanyl have a detrimental effect on the brain.
But some scientists argue that brain-centric disease characterizations of addiction do not sufficiently incorporate factors like social environment and genetics. In the recent critique, researchers contended that, rather than emphasizing the brain’s brokenness in perpetuity, an addiction definition should include the motivation or context in which the person chose to use drugs.
That choice, they said, is often about seeking an escape from intractable conditions such as a fraught home, undiagnosed mental health and learning disorders, bullying or loneliness. Generations of family addiction further tip the scales toward substance use.
In combination with medications that subdue opioid cravings, therapists could help patients identify the reasons that led them to use drugs and then encourage them to make choices that result in meaningful, sustained rewards.
In a 2021 paper in the journal Neuropsychopharmacology, Dr. Markus Heilig, a former research director at the National Institute on Alcohol Abuse and Alcoholism, defended the brain-disease diagnosis, saying evidence has been amply documented. But, his paper acknowledges, “Brain-centric accounts of addiction have for a long time failed to pay enough attention to the inputs that social factors provide to neural processing behind drug seeking and taking.”
In clinical practice, the term “addiction” is becoming increasingly nuanced. John F. Kelly, a psychologist and professor of addiction psychiatry at Harvard Medical School, defines addiction as “a severe substance use disorder that is at the point where there are lots of changes in the prefrontal cortex as well as deeper areas of the brain” that regulate emotion and behavior.
But only a small minority of people meet that criteria, he said. “Even within that severe range, there’s a lot of different degrees of impairment that can occur,” Dr. Kelly added. Genetics can exacerbate the severity of the response.
He offered the analogy of boarding a speeding train. “It starts off being an exhilarating ride, but at some point it gets out of control and becomes derailed. It’s a matter of when you can pull the emergency cord and get off,” he said, noting that some drug users never get the chance to do so before it’s too late.
That moment differs for everyone: “People will only change when there are negative consequences, but also when there is hope and optimism that change is possible, likely and sustainable.”
In disputing the characterization of addiction as a disease marked by compulsive or relapsing use, a few experts have argued that some drug and alcohol users can quit without treatment — and even return to occasional safe use.
In a 2021 paper in the journal Neuropsychopharmacology, Dr. Markus Heilig, a former research director at the National Institute on Alcohol Abuse and Alcoholism, defended the brain-disease diagnosis, saying evidence has been amply documented. But, his paper acknowledges, “Brain-centric accounts of addiction have for a long time failed to pay enough attention to the inputs that social factors provide to neural processing behind drug seeking and taking.”
In clinical practice, the term “addiction” is becoming increasingly nuanced. John F. Kelly, a psychologist and professor of addiction psychiatry at Harvard Medical School, defines addiction as “a severe substance use disorder that is at the point where there are lots of changes in the prefrontal cortex as well as deeper areas of the brain” that regulate emotion and behavior.
But only a small minority of people meet that criteria, he said. “Even within that severe range, there’s a lot of different degrees of impairment that can occur,” Dr. Kelly added. Genetics can exacerbate the severity of the response.
He offered the analogy of boarding a speeding train. “It starts off being an exhilarating ride, but at some point it gets out of control and becomes derailed. It’s a matter of when you can pull the emergency cord and get off,” he said, noting that some drug users never get the chance to do so before it’s too late.
That moment differs for everyone: “People will only change when there are negative consequences, but also when there is hope and optimism that change is possible, likely and sustainable.”
In disputing the characterization of addiction as a disease marked by compulsive or relapsing use, a few experts have argued that some drug and alcohol users can quit without treatment — and even return to occasional safe use.
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