CUD is a poorly defined cannabis condition

Cannabis Use Disorder (CUD) is defined as a relapsing disorder characterized by persistent use of marijuana despite negative consequences such as being arrested and incarcerated.

According to epidemiologists, roughly 219-million people throughout the world use cannabis. If marijuana consumers were to create their own quasi-nation-state, they would outnumber the populations of Russia (143-million) and the United Kingdom (68-million) combined.

Based on 2021 U.S. data approximately 16.3-million people met the criteria for CUD wherein prevalence is said to be highest among young adults (14.4% in ages 18–25). The studies also indicated men are more likely to develop CUD than women.

Diagnosing CUD is difficult because its interpretation is filtered through moral networks that vary across cultures, religions, and political landscapes. Religious traditions often frame non-medical drug use as being contrary to human dignity and temperance. Some religious groups are so radical about drug use they reject all medicinal interventions for themselves and their children. Moral narratives can shape whether individuals view their drug use as problematic. Added to the narratives are political issues where CUD becomes the focus of debates about legalization, public health, and regulatory laws.

The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5), has lumped marijuana “abuse” and “dependence” into a single disorder with eleven criteria, adding craving and withdrawal while removing all harmful legal issues. Mere use is considered abuse. This shift increased detections of mild to moderate cases of CUD and changed prevalence estimates.

The current criteria include loss of control over the use of cannabis, continued use despite physical or psychological harm, tolerance and withdrawal, and impaired functioning at work, school, or in relationships. DSM-5’s broader standards affect the prevalence statistics used in policy debates over full legalization.

When none of the DSM-5 criteria fit an individual cannabis consumer then the individual clearly should not be diagnosed as having CUD even though they might use cannabis. A majority—about 95-percent—of total marijuana consumers in the U.S. exhibit no CUD symptoms. They are healthy, functioning, well-informed and well-adjusted adults who in some cases are still vulnerable to the dragnet of marijuana prohibition and its punitive approaches. Governments are expected to balance harm reduction with autonomy and economic interests, but many fall short when it comes to substances that have been listed in Schedule I of the Controlled Substances and CSA Schedules.

No FDA approved medications exist for CUD. Treatment systems often lag rising drug exposures. Past drug trials have explored agents targeting cannabinoid receptors, glutamate signaling, and stress pathways to no avail. A 2023 systematic review found no completed psilocybin trials for CUD, although the review did expose some self-reported survey data suggesting at least some individuals experienced reduced cannabis use after psychedelics use. Psychedelics may work by modulating reward pathways, enhancing psychological flexibility, and reducing compulsive drug use patterns. Comprehensive research using psilocybin to treat CUD has yet to be completed.

Amazing progress is being made in addiction research. Recent breakthroughs in understanding brain chemistry and physiology point to solutions to a problem that has plagued societies for millennia. Modern scientific instrumentation can detect addiction pathways in the brain to reveal the brain structures linked to opioid and cocaine addictions. These pathways may someday be targeted by newly developed drugs and methodologies that alter specific neural pathways and block addictions.

A few chemical tools for addiction control may already exist. Presently it’s understood that SSRIs prescribed for depression reduce social anxiety, MDMA-assisted therapy can increase trust and emotional openness, and psychedelics can reduce rigid thinking patterns.

A problem affecting public acceptance of brain enhancement treatments is that reductions in rigid thinking are seen by some as posing a moral threat to their personal world view.

Moralistic arguments against marijuana and psychedelic drugs can still overshadow their use as drug substitutes or addiction blockers. Punishments and partial treatments tend to be preferred by prohibitionists compared to finding actual cures or more effective treatments lasting more than 24 hours.

A total cure would presumedly leave prohibitionists with little or no further justification to wage drug wars. However, the tribal instincts and superstitions which targeted cannabis consumers beginning in Europe in the 16th century would persist. Prohibition is mostly useless as a mode of social control if it cannot neutralize or erase tribal fears and inclinations.

By reversing the roles of drug user and prohibitionist, it’s easy to deduce that forced attempts to pharmacologically alter the tribal instincts of prohibitionists by forcing them to drink wine, use cannabis, or take psychedelics, would violate the individual’s autonomy, consent, political freedom, and human rights. It would resemble a coercive and perverse political psychiatry often associated with authoritarian regimes. It would give prohibitionists a taste of their own medicine.

Anti-drug crusaders can also fear recreational or mind-altering drugs that could trigger people to think for themselves and thereby reject someone else’s authority. These types of drug panics were harbored by Nazis who limited public education to only those topics which supported the Reich. To emphasize their totalitarian outlook, they burned books in the public squares. Nazi Germany preferred that their common citizens be ignorant, barely literate, dependent, and thereby subservient to the fascist goals of the Third Reich. No mind expansion was allowed.

By consuming marijuana citizens have issued a declaration of independence that says they don’t need someone else’s tyranny to survive. No need exists for an overwhelming drug authoritarian presence like that found in Russia and China which impose draconian drug use penalties upon their citizens. Drug war fraud will need to disappear if civil society is to prosper. With proper use of drugs people can feel better about themselves and others. They are in superior positions to chemically fortify themselves against those sadistic enough to want them to suffer or remain incapacitated based on little more than ill-defined, ill-equipped and ill-fated concepts like cannabis use disorder.

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11 Responses to CUD is a poorly defined cannabis condition

  1. Servetus says:

    Magic mushroom ingredient takes the fight out of aggressive fish:

    October 18, 2026 –…researchers in Canada examined the effects of psilocybin on the amphibious mangrove rivulus fish (Kryptolebias marmoratus). Their findings … suggest that even a brief exposure to a low dose can significantly reduce aggressive behavior without disrupting normal social interactions.

    “We show that an acute, low dose of psilocybin significantly reduces activity and aggressive attack behavior during social interactions in adult mangrove rivulus fish, a species that is naturally highly aggressive,” said first author Dayna Forsyth, a research associate and former MSc student at Acadia University in Nova Scotia.

    “These findings provide the first evidence that psilocybin can selectively reduce escalated aggression in a vertebrate model without suppressing social interaction,” added senior author Dr. Suzie Currie, a biologist at The University of British Columbia. […]

    Mangrove rivulus fish are naturally combative, particularly when they encounter another member of their species. Their aggressive responses are easy to recognize and measure, allowing researchers to detect even small changes in behavior.

    These fish also have an unusual reproductive ability. They can fertilize themselves, producing offspring that are genetically identical. This makes them especially useful for experiments because scientists can minimize genetic variation and more confidently attribute behavioral differences to psilocybin rather than inherited traits.

    For the experiment, the researchers worked with three genetically distinct lines of fish bred in the laboratory. One group received psilocybin, another provided the fish used to provoke social interactions, and the third helped researchers measure how much psilocybin entered and accumulated in the animals’ bodies. […]

    Fish exposed to psilocybin moved around less and displayed fewer bursts of aggressive swimming than fish that had not received the substance.

    To assess these changes, the scientists measured overall activity (time spent moving) and several signs of aggression (including swimming bursts). These rapid bursts are particularly important because they indicate that an encounter is escalating toward an attack, even when the fish cannot make physical contact.

    “Swimming bursts are high-energy attack behaviors that represent an escalation of aggression towards the stimulus fish without making physical contact,” explained Currie. “Other types of aggressive behaviors, like head-on displays, are more about communication and social assessment and require very little energy.”

    Interestingly, psilocybin did not suppress every form of aggressive or social behavior. While the fish became less likely to engage in intense, energy-demanding attacks, their less physically demanding social displays remained largely unchanged.

    “Psilocybin’s calming effect appears to selectively reduce energetically costly, escalated behaviors while lower-energy social display behaviors remained largely unchanged,” said Forsyth. “This suggests that this compound can selectively dampen escalated social conflict rather than shutting down behavior altogether.”

    The compound also reduced general activity. When placed alongside another member of their species, fish treated with psilocybin spent less time swimming than untreated controls.

    Together, these findings suggest that psilocybin may influence specific aspects of aggressive behavior rather than simply making animals less responsive to their surroundings. […]

    The researchers believe animal studies like this one could eventually help scientists better understand how psychedelic compounds influence behavior and identify possible directions for therapeutic research. […]

    Science Daily: Magic mushroom ingredient takes the fight out of aggressive fish–scientists discovered that the psychedelic compound in magic mushrooms can calm highly aggressive fish without disrupting their normal social behavior

    Frontiers in Behavioral Neuroscience: The magic of mushrooms: psilocybin influences behavior in the mangrove rivulus fish, Kryptolebias marmoratus

    Authors: Dayna Forsyth, Nicoletta Faraone, Simon G. Lamarre, Suzanne Currie.

  2. Servetus says:

    Hunger and the formation of reward memories play a role in alcohol addiction:

    19-Oct-2026 – Researchers at Brown University have discovered a molecular link between hunger and the formation of “reward” memories that play a role in alcohol addiction. The insight could inform strategies for treatment and prevention, the scientists say.

    The study, led by researchers at Brown’s Carney Institute for Brain Science, mapped and isolated hunger-responsive neurons in the brain of the common fruit fly, which has a sophisticated brain that makes it a useful model for observing neural behavior. The team found that hunger in food-deprived flies activated neurons containing octopamine — a fight-or-flight neurotransmitter equivalent to human norepinephrine — that influences whether alcohol is remembered as rewarding. […]

    “If we can understand at a smaller level how an organism like a fly can remember alcohol, that is a step forward to understanding how humans associate cues with alcohol and can provide hints at how we can prevent relapse and treat addiction,” said Lewis Sherer, a postdoctoral researcher at Brown and a study first author.

    Sherer works in the lab of Karla Kaun, an associate professor of neuroscience at Brown affiliated with the Carney Institute. Previous studies by scientists in Kaun’s lab have helped to uncover the role of memory formation underlying addiction — how memories of alcohol as a reward can drive cravings — as well as the role alcohol and other addictive substances play in altering memory pathways.

    Sherer said that prior studies have focused mainly on “reward” molecules such as dopamine. But researchers are also beginning to understand the implications of different internal states, such as hunger, thirst and pain, in the formation of reward memories that drive alcohol addiction. For this study, the team wanted to further investigate the potential role of octopamine, a fly version of norepinephrine that is activated by hunger, thirst and pain to influence fly behavior, memory and sensory processing. […]

    …genetically silencing or activating a single octopamine neuron in the brain (VUMa3) influenced how soon flies found alcohol rewarding and affected alcohol preference only when the flies were hungry. According to Kaun, the takeaway is that hunger can recruit new neurons to communicate with brain circuits that associate cues in the environment with a rewarding feeling connected to alcohol.

    “For example, perhaps you usually pass by a bar you like on your way home from work every day,” Kaun said. “But maybe today you’re hungry after skipping lunch. You’re more likely to notice that cute sign and feel like stopping to have a drink. The cute sign, which didn’t entice you when you weren’t hungry, can trigger your craving for alcohol.”

    The researchers said the work could bring scientists one step closer to determining how external stressors, such as food insecurity, could influence the internal reward systems involved in alcohol and drug addiction. […]

    AAAS Public Science News Release: Hunger may play a role in alcohol addiction, new study finds — Brown University scientists conducting experiments with fruit flies found that hunger drives cravings for alcohol, providing context for understanding similar processes in the human brain

    Current Biology: Hunger recruits a parallel circuit encoding alcohol reward

    Authors: Kavin M. Nuñez, Lewis M. Sherer, Anthony Walley, Sarah Salamon, Vivian M. Chan, Mustafa Talay, Gilad Barnea, R. Steven Stowers, Karla R. Kaun.

  3. Servetus says:

    Regular tea consumption was linked with an 11% lower risk of experiencing cardiovascular disease, cerebrovascular disease, pulmonary heart disease, and peripheral artery disease:

    21-Oct-2026 – Among 485,934 adults in China followed for a median of 9.05 years, there were 14,863 cases of cardiovascular disease, cerebrovascular disease, pulmonary heart disease, and peripheral artery disease. Regular tea consumption was linked with an 11% lower risk of experiencing these outcomes. The lowest risk was estimated at approximately 6–8 cups per day among weekly drinkers.

    Black tea showed more consistent inverse associations with vascular disease than green tea. Regarding strength, moderate-strength tea was associated with the lowest risk. Interestingly, “burning hot” tea was associated with an elevated risk of vascular disease.

    “Joint analyses showed that tea consumption, smoking status and physical were collectively associated with vascular risk, with the favourable combination of habitual tea consumption, non-current smoking and high physical activity associated with the lowest risk,” the authors wrote. […]

    AAAS Public Science News Release: Can drinking tea help protect against cardiovascular disease?

    Journal of Internal Medicine (JIM) — Habitual tea consumption is associated with lower cardiovascular disease risk

    Authors: Zichen Ye, Yawen Wang, Yimin Qu, Manman Chen, Jinming Fan, He Zhu, Keyu Han, Yuankai Zhao, Jiahui Wang, Qu Lu, Dianjianyi Sun, Canqing Yu, Jun Lv, Yu Guo, Yu Jiang, Liming Li.

  4. Servetus says:

    Psychosocial plus genetic factors in patients’ prognoses in recovery from substance use disorders:

    20-Oct-2026 – A new study by researchers at the University of Illinois Urbana-Champaign highlights the importance of considering both psychosocial and genetic factors in patients’ prognoses and intervention planning in their recovery from substance use disorders.

    The study is novel in that it integrated multiple forms of data — including genetic data on heritable risk factors and statistics on the various psychosocial resources available to support individuals’ recovery — to analyze 7,200 U.S. adults’ probability of remission and relapse, said first author Janaka V. Kosgolla, a research scientist in the School of Social Work’s Center for Prevention Research and Development. […]

    …a data set from the National Institutes of Health All of Us Research Program that contained information on adults ages 18 or older who were treated for substance use problems between December 2020 and October 2023. Eligible participants were identified from diagnoses, toxicology measurements, medications and treatment procedures for those with substance use problems other than nicotine, according to the study, published in the journal Addiction.

    Addiction is a complex biological process, with individuals’ risk increased by interactions among hereditary genetic variations and environmental factors, according to a news release on the National Institutes of Health website. The current study is one of a few projects that integrated patients’ genetic liability with recovery capital resources to measure an individual’s probability of remission and relapse over time. […]

    “Recovery capital is conceptualized as all the resources that you need to stay sober,” said Smith, who is also a professor of social work at Illinois. “These resources include things such as employment, adequate housing, good mental health and access to transportation, along with adequate numbers of treatment facilities and support groups at the community level.”

    Using factors such as these and patient survey data from the All of Us dataset, the researchers constructed a recovery capital index with 21 items that spanned human, physical, social and cultural resources. They also created a genetic liability measure that included nearly 585,000 genetic variants and 10 adjusted ancestry-related traits that they used to evaluate the impact of recovery capital on remission at low, medium and high levels of genetic risk, Smith said.

    Remission in a given month was considered to be either a related diagnostic code or negative toxicology result in patients’ electronic health records, and remission episodes were contiguous runs of months in remission. On the other hand, active substance use was based upon either a positive toxicology result or a substance use diagnosis without a remission qualifier, according to the study.

    Of 7,257 participants, 2,413 people had at least one documented remission episode during the time period studied. Alcohol (33.6%) and opioid use disorders (38%) accounted for the majority of the remission episodes, while cannabis use disorder represented only 1.9% of remissions, the researchers found. […]

    Higher recovery capital with low genetic risk increased the probability of remission at 12 months by 8-11 percentage points, Kosgolla said.

    “The recovery capital conveys meaningful information across most of the genetic range, and by integrating genetic data with psychosocial recovery resources this study provides a more holistic clinical assessment of patients,” Kosgolla said. “The findings suggest that individuals’ remission trajectories are jointly influenced by the recovery resources available to them and their genetic liability. This pattern conveys that there are complex interactions, with an overlap of social and biological factors, highlighting the importance of considering both types of factors in substance use disorder prognosis and planning.”

    When individuals in recovery have multiple vulnerabilities, factors such as housing stability, social support, daily structure and coping resources are particularly important, the researchers said. […]

    AAAS Public Science News Release: Substance use disorder recovery, remission linked with genetic, psychosocial factors

    Addiction: Joint associations of recovery capital and polygenic risk with electronic health record observed remission and relapse in substance use disorder: Longitudinal evidence from the All of Us research program

    Authors: Janaka V. Kosgolla, Douglas C. Smith.

  5. Servetus says:

    Median drug launch prices continue to exceed $250,000 per year:

    20-Oct-2026 — BOSTON and SAN DIEGO, October 20, 2026 – Today the Institute for Clinical and Economic Review (ICER) and West Health released a new “Launch Price and Access Report,” finding that the median drug launch prices continue to exceed $250,000 per year, contributing to increases in overall healthcare costs. […]

    This report focused on “net price,” or the actual price paid after rebates and discounts, offering crucial information to policymakers, given that most previous analyses of drug pricing trends focus on the publicly available “list price,” which does not always reflect the actual price paid.

    Key findings from the report include:

    The median net launch price of drugs rose sharply, by 35%, from $190,000* in 2022 to $257,000 in 2025 (adjusted for inflation).

    Although this price decreased slightly, by 2%, between 2024 and 2025, it remained at historically high levels, creating challenges across the health care system.

    About one in four drugs introduced in 2025 had an annual net price exceeding $500,000, while an additional 34% were launched at prices between $200,000 and $500,000.

    Only about one in three newly approved drugs previously reviewed by ICER are priced at or below ICER’s recommended price benchmark, with the remainder exceeding their estimated value.

    The data showed the complexity of patient access during the first year post-approval, with only one-third of outpatient prescriptions ultimately filled within 30 days of attempting to fill them. A significant proportion of prescriptions were rejected due to non-coverage, likely due to new-to-market blocks. […]

    “This independent analysis shows that we are facing a critical moment in the US health care system,” stated ICER’s President and CEO Sarah K. Emond, MPP. “Overpayment for drugs beyond their value to patients is contributing to decreased patient access. While the US has produced some of the world’s most incredible innovations, patients are still experiencing significant barriers to care. Now more than ever, it is crucial that we start working towards the goal of pairing fair pricing with fair access – leading to a more affordable health system for us all.”

    “Many Americans are struggling to access the prescription medications they need,” said Timothy Lash, President and Chair of the West Health Policy Center. “This year’s Launch Price and Access report reveals just how serious the problem is becoming. The data shows the struggle with high launch prices is even more stark for Medicare recipients who face higher rates of coverage rejections than all other payer types. Even when Medicare beneficiaries can get access, paying more for drugs means hard tradeoffs for American seniors living on a fixed income.” […]

    AAAS Public Science News Release: ICER, West Health releases new report indicating that median prices of newly launched drugs continue to exceed $250,000 — despite policy shifts, high prescription drug prices continue to create major barriers to care

  6. Servetus says:

    Peculiar non-psilocybin mushrooms have hallucinogenic effects involving seeing tiny Lilliputian figures:

    October 25, 2026 — People living thousands of miles apart have reported an extraordinarily strange experience after eating certain wild mushrooms. They begin seeing tiny human figures that appear to move through the real world, walking around objects, climbing over surfaces, and interacting with their surroundings.

    These visions are known as Lilliputian hallucinations, named after the miniature inhabitants of “Gulliver’s Travels,” who stand just 6 inches tall. For decades, researchers suspected that cultural beliefs and folklore might explain why people in different regions described such similar experiences.

    Now, a new study provides evidence that the phenomenon has a biological explanation.

    Researchers … used DNA sequencing to identify Lanmaoa asiatica as the mushroom responsible for these unusual hallucinations in Southwest China and the northern Philippines. Surprisingly, their investigation found no evidence of any known psychoactive mushroom compounds, including psilocybin.

    The findings suggest that the mushroom may produce an entirely unfamiliar hallucinogenic substance. Identifying that chemical could help scientists better understand neurological disorders, unusual visual experiences, and the processes through which the brain creates our perception of reality. […]

    Science Daily: This mysterious mushroom makes people see hundreds of tiny humans

    YouTube Video:

    https://www.youtube.com/watch?v=2osihzvMIxQ

    Mycologia: Phylogenomic systematics of Lanmaoa (Boletaceae) reveals cryptic diversity, resolves global evolutionary relationships, and suggests a novel psychoactive lineage

    Authors: Colin Domnaur, Brim T. N. Dentinger.

  7. Servetus says:

    Psilocybin treatments are being tested for treating co-occurring cocaine use disorder and major depression:

    21-Oct-2026 – A team of UTHealth Houston researchers has been awarded a five-year, $3.4 million grant to study whether psilocybin-assisted therapy is a viable treatment option for individuals with co-occurring cocaine use disorder and major depressive disorder.

    “A lot of people with cocaine use disorder also have depression,” said co-principal investigator Thomas D. Meyer, PhD … “There is evidence psilocybin works for depression. Instead of treating each condition separately, why don’t we target people with comorbid cocaine use disorder and depression?”

    Psilocybin, also referred to as “magic mushrooms,” is a naturally occurring psychedelic compound known for its hallucinogenic effects. To evaluate its potential as a treatment for cocaine use disorder and depression, about 50 adults who are diagnosed with both conditions will be enrolled in the 12-week study and receive up to two doses of psilocybin at a UTHealth Houston clinic. […]

    “Psilocybin appears to enhance communication across brain regions and increase cognitive flexibility,” she said. “This may be particularly beneficial for people with these disorders who often get stuck in rigid and unhelpful ways of thinking, feeling, and behaving.”

    Participants will also receive multiple sessions of acceptance and commitment therapy, or ACT, a form of talk therapy, before and after receiving the drug. […]

    The team hopes that the drug, in combination with ACT, will simultaneously reduce depressive symptoms and increase abstinence from cocaine. […]

    Unlike major depressive disorder, there are no FDA-approved interventions for cocaine addiction.

    The study is funded by the National Institute on Drug Abuse, part of the National Institutes of Health.

    Other UTHealth Houston researchers on the study include Jair C. Soares, MD, PhD; Michael Weaver, MD; Wen Li, PhD; Charles Green, PhD; and Dan Petrovitch, PhD.

    AAAS Public Science News Release: NIH awards UTHealth Houston $3.4M to study psilocybin to treat cocaine addiction, depression

  8. Servetus says:

    Naloxone may not be a major reason opioid overdose deaths have fallen:

    21-Oct-2026 – PROVIDENCE, R.I. [Brown University] — Increased use of the overdose-reversing drug naloxone may not be a major reason opioid overdose deaths have fallen sharply across the U.S. since 2023, according to a study that challenges a leading explanation for the decline. […]

    … the analysis of 2.5 million nonfatal overdoses comes after decades of rising opioid overdose deaths, a trend that began reversing in May 2023. In recent decades, efforts to expand access to naloxone, commonly known by the brand name Narcan, have made the medication more widely available to people who use drugs, their families and emergency responders. States loosened barriers to access, community distribution programs expanded, and federal regulators approved Narcan for over-the-counter sales.

    Despite wider availability, the researchers found no corresponding increase in naloxone use relative to the number of overdoses captured in emergency medical services data, including records from 5,324 EMS agencies nationwide between May 2020 and December 2025.

    Comparing trends before and after May 2023, researchers found that nonfatal drug overdoses were 20.9% below levels projected from earlier trends, while opioid-related overdoses were 32.7% below projections. Naloxone administrations also fell, dropping 21.3% below projected levels. […]

    …naloxone was being used at nearly the same rate as before the decline. Use by bystanders, including friends and family members, however, was 28.6% lower than expected based on earlier trends, even after accounting for the decline in overdoses.

    Barnett said the findings suggest that fewer overdoses overall — possibly because of changes in the illicit drug supply or how people use opioids — may be helping drive the decline in deaths rather than more people being revived with the medication. The study did not examine those possible explanations directly, Barnett added, or look at what caused the overall decline. The data also did not capture overdoses handled outside the emergency medical system, including those reversed by bystanders without a call to 911. […]

    AAAS Public Science News Release: Fewer overdoses, not increased naloxone use, may help explain decline in US overdose deaths: Researchers found that naloxone use did not increase relative to the number of overdoses as deaths have fallen since 2023, suggesting that other factors may be driving the national decline in overdose deaths

    JAMA: Nonfatal Drug Overdoses and Naloxone Use

    Authors: David T. Zhu, BSc; J. Travis Donahoe, PhD; Michael L. Barnett, MD, MS.

  9. Servetus says:

    LSD reconfigures cortical dynamics through faster brain rhythms and increased fractal dimension:

    21-Oct-2026 — After being the subject of extensive psychiatric studies in the 1950s and 1960s, and then long associated with recreational or spiritual use, LSD has attracted renewed scientific interest over the past decade, driven by research into the therapeutic potential of psychedelics for treating depression, anxiety and post-traumatic stress disorder.

    Yet despite this enthusiasm, how this molecule transforms the brain’s electrical activity remains poorly understood. And does it do so in the same way as other psychedelics? Answering these questions is essential to developing these treatments responsibly, but also to uncovering the mechanisms by which the brain gives rise to consciousness.

    A new international study published in the journal Communications Biology provides some answers: LSD does not merely weaken the brain’s rhythms, it speeds them up, and it makes brain activity more fractal, with signals recurring in patterns across different time scales. This acceleration may even be a signature unique to LSD. […]

    The collective activity of neurons produces electrical rhythms known as “brain waves.” Alpha waves dominate when we are at rest with our eyes closed; beta waves are associated with concentration and decision-making, among other things.

    Under psychedelics, these waves appear less intense, which is generally interpreted as “desynchronization,” meaning that neurons fire less in unison.

    But conventional methods did not always distinguish between a genuine weakening of the waves and a change in their frequency, that is, the number of oscillations per second. […]

    To find out whether these rhythms were truly weakening, changing speed, or both, the research team used state-of-the-art signal-processing methods combined with artificial intelligence to analyze magnetoencephalography (MEG) data collected at Imperial College London by Robin Carhart-Harris’s team.

    MEG measures, to the millisecond, the tiny magnetic fields produced by neuronal activity. For the study, 17 healthy volunteers took part in two sessions, two weeks apart: in one, they received an intravenous injection of LSD (75 micrograms, roughly the weight of a grain of salt); in the other, a placebo (a saline solution).

    The team discovered that under LSD, alpha and beta waves do not simply weaken: they also increase in frequency, that is, the speed at which they oscillate. Wave oscillations are measured in hertz, the number of cycles per second. Under LSD, alpha waves increase by about 2 hertz and beta waves by about 5 hertz, across large areas of the cortex.

    “Imagine a radio station switching its broadcast frequency from 99.5 to 100.5 FM,” said Jerbi. “If your radio stays tuned to 99.5, the signal may seem distorted or lost. In the same way, overlooking the shift to faster brain rhythms can lead us to misinterpret LSD’s effects on the brain.”

    Unlike certain anesthetics, which slow the alpha rhythm, LSD speeds it up, a sign of a more excitable cortex. […]

    Beyond brain waves, the researchers found that LSD makes brain activity more complex, more fractal and less predictable, somewhat as if the brain were exploring a broader repertoire of possible behaviours rather than following a steady rhythm.

    A fractal is a shape that reappears in each of its parts, even the smallest: every floret of a Romanesco broccoli, for example, is itself a small Romanesco, made up of even smaller florets. Applied to the brain, this concept describes a signal whose patterns recur across different time scales.

    The researchers measured this “fractal dimension,” as well as the diversity of patterns in the signal. Both increase under LSD: the brain signal becomes richer in detail and more irregular, much like the outline of a jagged rocky coastline, where every zoom reveals new coves, compared with that of a perfectly straight beach.

    The study found that these changes are particularly pronounced in brain regions involved in sensory perception, language, emotion and mental imagery, while the motor cortex remains relatively unaffected. This could explain why psychedelics alter perception and introspection so profoundly without necessarily disrupting movement. […]

    The researchers then trained an AI algorithm to distinguish LSD sessions from placebo sessions based on brain signals alone. By combining all the measures, it does so correctly 88 per cent of the time, compared with 50 per cent by chance alone, they found.

    “Our machine-learning algorithm can distinguish brain states under LSD from those under placebo using brain signals alone,” said Subramani. “By examining the clues it relies on, we can identify LSD’s signatures in brain activity.”

    These signatures include the complexity and fractality of the signals, changes in their “background noise,” and the speeding up and weakening of alpha and beta rhythms. […]

    Meanwhile, a formulation of LSD is already being evaluated for generalized anxiety disorder and depression in phase 3 clinical trials, the final stage of testing before a treatment can be submitted for regulatory approval.

    In further research using similar methods, Subramani and his colleagues are now comparing how LSD, psilocybin (the active ingredient in “magic mushrooms”) and DMT (a naturally occurring psychedelic found in ayahuasca, a traditional South American brew) affect the brain. […]

    AAAS Public Science News Release: LSD does more than desynchronize the brain

    Communications Biology: LSD reconfigures cortical dynamics through faster brain rhythms and increased fractal dimension

    Authors: Venkatesh Subramani, Timothy Nest, Annalisa Pascarella, Jérémy Brunel, Yorguin José Mantilla Ramos, Yann Harel, Suresh Muthukumaraswamy, Robin Carhart-Harris, Giulia Lioi, Nicolas Farrugia & Karim Jerbi.

  10. Servetus says:

    Inflammation and mitochondrial stress were reduced after psilocybin therapy in Parkinson’s disease patients:

    October 21, 2026 — Markers of systemic inflammation and mitochondrial stress were reduced after psilocybin therapy in Parkinson’s disease patients with mood dysfunction, a small nonrandomized trial showed.

    Relative to baseline, an inflammatory index was significantly lower at all follow-up time points after psilocybin was administered, reported Ellen Bradley, MD, of the University of California San Francisco (UCSF), and co-authors.

    “To our knowledge, this is the first report of changes in these types of markers after psychedelic treatment in people with a neurodegenerative disease,” Bradley told MedPage Today. “That gives us and other researchers super-interesting biological questions to pursue: What could be producing these changes, are they consistent in larger groups of people, and do they have anything to do with clinical benefits people with Parkinson’s might experience with psilocybin?” […]

    This research comes… on the heels of work showing that psilocybin appeared to block nerve damage related to chemotherapy in mice, he pointed out. […]

    “However, this study is in patients with a neurological condition — Parkinson’s disease — and shows evidence that psilocybin may have impacted biological markers of inflammation and mitochondrial stress,” he told MedPage Today.

    “These new data suggest biological effects of psychedelics could be driving potential benefits in patients and pave the way for more work to better understand how psilocybin might be a useful therapeutic both in psychiatric and non-psychiatric conditions,” he added. […]

    MedPage Today: Psilocybin Tied to Lower Inflammation in Parkinson’s Trial — Study provides first data about effects in any neurodegenerative disorder

  11. Servetus says:

    Mindfulness-oriented recovery enhancement in opioid use disorder:

    28-Oct-2026 — Mindfulness-Oriented Recovery Enhancement (MORE), a behavioral therapy used alongside medication treatment, may help people with opioid use disorder respond differently to drug-related cues and natural rewards, according to a randomized clinical trial led by researchers at the Icahn School of Medicine at Mount Sinai. The findings offer insight into how MORE may reduce opioid craving and support recovery.

    … the study used brain imaging to examine how MORE affects the prefrontal cortex, which helps regulate behavior, make decisions, and evaluate rewards. After eight weeks, participants who received MORE showed changes in brain activity while regulating their responses to drug-related images. These changes were associated with greater reductions in craving. At a follow-up visit approximately four months after treatment, participants receiving MORE also had greater increases in the duration of abstinence than those receiving a comparison therapy.

    “Opioid use disorder is a chronic condition that can involve persistent cravings and a risk of relapse, even among people receiving medications such as methadone or buprenorphine,” says Rita Z. Goldstein, PhD, Mount Sinai Professor in Neuroimaging of Addiction, Icahn School of Medicine at Mount Sinai, and senior author of the paper. “While these medications are established treatments, additional approaches that help people manage cravings and engage with rewarding experiences beyond drug use could further support recovery.” […]

    MORE combines mindfulness training, cognitive reappraisal (changing how a person interprets and responds to drug-related triggers), and savoring (paying attention to and enjoying everyday positive experiences). The treatment aims to reduce the influence of drug-related cues while strengthening responses to natural rewards. Study co-author Eric L. Garland, PhD, of the University of California San Diego developed MORE.

    Previous studies have found that MORE can improve clinical outcomes for people with opioid misuse or opioid use disorder. However, researchers have not fully understood the brain mechanisms behind these effects.

    The trial drew on the impaired response inhibition and salience attribution (iRISA) model of addiction. This model proposes that drug cues can command disproportionate attention and reward-related responses, while the brain’s ability to regulate behavior weakens. The study focused on two regions: the lateral prefrontal cortex, which helps regulate craving, and the ventromedial prefrontal cortex, which helps assign value to drug-related and other rewards. […]

    Brain imaging revealed differences between the treatment groups. When participants were asked to reinterpret drug-related images to reduce their emotional impact, the MORE group showed less drug-related activity in the lateral prefrontal cortex than the comparison group. Within the MORE group, greater changes in prefrontal responses to drug cues and increased ventromedial prefrontal activity while savoring positive food-related images were associated with larger reductions in craving.

    The movie-watching task revealed another difference. Participants receiving MORE showed less synchronized activity in the medial prefrontal cortex while viewing the same drug-related scenes than those receiving the comparison therapy. These similarities in brain activity across people, called inter-subject correlations, were the basis for the movie analyses. Across all participants, larger reductions in synchronized medial prefrontal responses were associated with larger reductions in craving triggered by the scenes. The findings suggest that realistic movie scenes may complement other methods for studying responses to drug cues, particularly in detecting early recovery of bottom-up drug-biased reactivity. Importantly, MORE was studied as an addition to medication treatment, not a replacement. […]

    AAAS Public Science: Mindfulness-based therapy may change brain responses to drug cues in people with opioid use disorder, Mount Sinai study finds

    JAMA Psychiatry: Prefrontal Cortical Changes With Mindfulness-Oriented Recovery Enhancement in Opioid Use Disorder

    Authors: Yuefeng Huang, PhD; Ahmet O. Ceceli, PhD; Greg Kronberg, PhD; K. Rachel Drury, BM; Sarah G. King, PhD; Natalie E. McClain, BA; Yui Ying Wong, BA; Maggie Boros, BS; Eduardo R. Butelman, PhD; Pierre-Olivier Gaudreault, PhD; Muhammad A. Parvaz, PhD; Nelly Alia-Klein, PhD; Eric L. Garland, PhD; Rita Z. Goldstein, PhD.

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