When mental health treatment was used, U.S. adults with chronic pain are more than twice as likely as others to experience continuing anxiety or depression symptoms. A new University of Arizona Health Sciences study found that adults with chronic pain are more likely to experience symptoms of anxiety and depression than people without chronic pain, yet they access mental health care at lower rates and are less likely to have their mental health needs met in treatment. The study team found that only 44.4% of people with chronic pain, an estimated 9.5 million people, used mental health services and had their anxiety and depression symptoms adequately treated, compared with 71.5% of those without chronic pain. A new University of Arizona Health Sciences study found that adults with chronic pain are more likely to experience symptoms of anxiety and depression than people without chronic pain, yet they access mental health care at lower rates and are less likely to have their mental health needs met during treatment. Excessive alcohol consumption is also a known causal agent in the development of alcohol-related neuropathy, which can be characterized by damage to sensory, motor, and autonomic nerves, potentially due to direct neurotoxic effects of alcohol on the central and peripheral nervous systems (e.g., Chopra & Tiwari, 2012).
George F. Koob
This dynamic can present unique challenges for recovering individuals suffering from acute and/or chronic pain, as well as for the physicians responsible for treating both conditions. Researchers found that when mental health treatment is used, U.S. adults with chronic pain are more than twice as likely as others to experience continuing anxiety or depression symptoms. We found significant escalation of drinking in the dependent group in male and female compared with the non-dependent group. The dependent group developed strong mechanical allodynia during 72 h of withdrawal, which was completely reversed immediately after the voluntary drinking. Moreover, we observed an increased pain hypersensitivity (allodynia) compared with the naïve group in 40% and 50% of non-dependent male and female mice, respectively.
George Koob
NIMH statistics pages include statistics on the prevalence, treatment, and costs of mental illness for the population of the United States. So my goal and my No. 1 hope for the future of pain medicine is that researchers find a better way of predicting who is going to respond to a particular treatment, which would allow them to match each patient to the right treatment regimen the first time. Researchers like me don’t yet know what the defining characteristics are of one patient versus another in terms of those outcomes. This means current treatment plans involve a lot of trial and error, which can be slow and frustrating for patients in pain. But activation of those nerves alone does not equal pain, because those electrical signals are amplified or diminished at multiple points throughout their transit to the brain.
Sensitivity, specificity, and discordance with self-report of nail sample testing for alcohol and cannabis
For example, spontaneous pain induced by nerve injury reduced morphine’s ability to induce conditioned place preferences (Ozaki et al., 2002, 2004) and suppressed the ability of morphine to lower brain stimulation reward (BSR) thresholds (Ewan and Martin, 2011). Because baseline BSR thresholds were unchanged by nerve injury, changes in heroin effects could not be attributed to general disruption of reward function. In light of alcohol’s effects on opioid systems, examining alcohol self-administration, particularly dose–response functions (see Carnicella et al., 2011) in chronic pain models such as these is warranted.
In this sense, it has been suggested that addiction could be considered a type of chronic emotional pain syndrome (Koob and Le Moal, 2006, p. 449). Each year, an estimated 116 million Americans suffer from persistent pain arising from a variety of sources. Alcohol dependence and chronic pain share common neural circuits giving rise to the possibility that chronic pain states could significantly affect alcohol use patterns and alcohol dependence could influence pain sensitivity (Egli et al., 2012). The National Institute of Alcohol Abuse and Alcoholism organized a satellite symposium that highlighted central and peripheral mechanisms involved in pain transmission and in the development of alcohol and drug dependence. Of interest is whether these circuits are affected by chronic alcohol exposure, stressors and other insults to mutually influence the development of alcohol dependence as well as pain-related problems. This symposium summary presents evidence that brain circuits implicated in key aspects of addiction, namely central reward circuits involving nucleus accumbens (NAc), medial prefrontal cortex (mPFC) networks and emotion circuits composed of the amygdala and the mPFC, also play an important role in pain states and pathology.
The paper, “The unmet mental health needs of U.S. adults living with chronic pain,” was published in the journal Pain. One is that people who abuse alcohol are more likely to engage in risky behaviors that can lead to chronic pain. Symptoms of AAN are due to impairments in both sympathetic and parasympathetic autonomic fibers of the cardiovascular, digestive, and urogenital systems. Appenzeller and Ogin (1974) showed that alcohol-dependent and diabetic patients had a reduced number of large fibers (greater than 5 μm) and greater density of autonomic fibers (possibly because of the degeneration followed by a partial regeneration) [161]. The reduction of internodal length contributes to the decreased speed of nerve conduction which may be implemented in impairments in perspiration, baroreceptor reflexes, and functions of internal organs.
- Moreover, in a longitudinal study, Boissoneault and colleagues [33], found that depression was predictive of alcohol problems only in women but not in men.
- This may account for the lack of statistical significance for the difference between the ALC and CTRL groups in age of onset of depressive disorders.
- Attention, expectation, and reappraisal are thought to be the most important contributing factors for the cognitive modulation of pain (Porro et al., 2002; Wiech, Ploner, & Tracey, 2008).
- Gastrointestinal symptoms include delayed stomach emptying and intestinal transit, dyspepsia, and faster emptying of the gallbladder [165].
Finally, given that stress-related cues have been shown to increase craving in abstinent alcoholic patients (Sinha et al., 2009), there is reason to hypothesize that pain may increase cravings for alcohol, and that persons in pain may be motivated to drink in order to alleviate those cravings (e.g., Bottlender & Soyka, 2004). Potential mechanisms by which pain may serve as a motivator of alcohol use include negative and positive reinforcement, lack of alternative strategies for pain-coping, and overlapping neural systems that process stress and reward. Negative reinforcement models of addiction posit that substance use is motivated, in part, by a desire to alleviate aversive psychological and physical states (e.g., McCarthy, Curtin, Piper, & Baker, 2010). One possibility is that pain may motivate alcohol consumption via a desire to alleviate pain-related negative affect. Negative affect is a central component of pain-processing (e.g., Wade, Dougherty, Archer, & Price, 1996), and it has been suggested that coping with negative affect may be a primary drinking motive among persons with AUD (e.g., Kuntsche et al., 2005). As noted earlier, pain has also been conceptualized as a stressor (Blackburn-Munro & Blackburn-Munro, 2001), and alcohol users may be motivated to drink in response to stress, particularly if they hold expectancies for alcohol-induced tension reduction (Armeli, Carney, Tennen, Affleck, & O’Neil, 2000).
The result suggests again that prefrontal/limbic circuitry is preferentially involved in perception of chronic pain, and in this case, ongoing chronic back pain. Subsequent studies further reinforced the notion that the mPFC engaged in chronic pain is part of the prefrontal circuitry being identified for cocaine and other types of addictive drug use (Kalivas et al., 2005; Koob and Volkow, 2010; Goldstein and Volkow, 2011). Recurrent pain is highly prevalent among treatment seeking problem drinkers (Boissoneault, Lewis, & Nixon, 2018; Sheu et al., 2008), and alcoholism is considered a risk factor, both for the development of chronic pain in patients who suffer from AUD, and for relapse in those attempting to remain abstinent. But despite numerous reports on the associations between chronic pain and AUD, the underlying mechanisms involved in linking them remain elusive. AUD may share common neural pathways with chronic pain, which may facilitate pain affecting alcohol use patterns, or facilitate modulatory effects of alcohol on pain processing, thereby precipitating the risk of chronic pain development.
The current review also identified numerous sociodemographic, psychiatric, and environmental factors common to both pain and alcohol use (e.g., socioeconomic status, anxiety and depressive disorders, tobacco smoking). As these factors may confound the study of relations between pain and alcohol, future research would benefit from accounting for these relevant third variables. Future research mental health and substance abuse health coverage options may also examine other relevant third variables (e.g., comorbid medical conditions, emotional distress) that could further inform our evolving conceptualization of reciprocal relations between pain and alcohol use. We do not know precisely how many people are affected by alcohol neuropathy, but research has shown that at least 66% of chronic alcohol abusers may have some form of neuropathy.
(Washington, DC – July 31, 2024) – TFAH’s Pain in the Nation report series tracks levels of alcohol, drug, and suicide deaths nationally and for population groups. This 2024 edition, reporting on 2022 data, found that a decrease in the alcohol-induced mortality rate led to a slightly lower combined rate of all U.S. deaths due to substance misuse and suicide, but the long-term trend of such fatalities is still alarmingly high. The paper, “The unmet mental health needs of U.S. adults living with chronic pain,” was recently published in the journal PAIN. However, there are some patients with chronic pain for whom opioids truly provide benefit in terms of pain relief and quality of life.
Dysfunction in the brain reward system seems to be considered as the prominent shared pathological link among these conditions [38]. However, it is not clear why despite the overlap between neural pathways underlying chronic pain and alcohol abuse, as well as the high comorbidity of both of those conditions with depression, the burden of depressive disorders is greater in people with ALC. Abnormalities in brain reward areas such as prefrontal cortex, anterior cingulate cortex, and insula, are consistently reported in association with chronic pain [18] and addictions [8,39].
The discovery that brain reward circuitry, mainly the involvement of the nucleus accumbens (NAc), was involved in chronic pain occurred serendipitously in a study examining differences in brain activation to acute thermal pain in individuals with chronic pain and healthy subjects (Baliki et al., 2010). In this study, no group differences were found in the psychophysical results and brain activity measures in response to the stimulus and to its perception. However, brain activity contrast between the groups identified bilateral recovery national institute on drug abuse nida NAc activity, as a region not correlated to the stimulus or the perception, but significantly more active in the patient group. Further analysis of the BOLD signal in the NAc revealed the existence of transient activity in the NAc that signaled the impending pain—a salience signal—and the cessation of the stimulus as the impending reward value of analgesia. Importantly, the reward value BOLD signal was completely reversed in the chronic pain patients, as if they were disappointed with the stimulus cessation.
First, despite evidence that persons with chronic pain endorse the use of alcohol to cope with pain, we are not aware of any experimental studies that have explicitly tested whether pain may motivate alcohol approach or consumption. Future addicted brain experimental research should test whether situational pain increases craving for alcohol or subsequent alcohol consumption. Second, relatively few experimental studies have been conducted to test effects of alcohol on pain responding.
