Frontier mental health research: psychedelics & drug studies

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42 papers

Anxiety

Based on 52 papers

Research points to two clear groups of treatments for anxiety. First, ordinary approaches like exercise — especially walking and other regular physical activity — have strong, high-quality evidence showing medium-sized reductions in anxiety symptoms. These are proven in many randomized trials and reviews. Second, newer substance-assisted therapies (often called psychedelic‑assisted therapy) are promising. Small clinical trials and reviews show reductions in anxiety and related problems after carefully supervised doses of drugs such as psilocybin, MDMA, ketamine, and ayahuasca. However, these drug approaches are mostly early-stage or done in special research settings and need more, larger trials before they can become routine care. People thinking about or treating anxiety should know that drug‑assisted therapies are almost always given together with serious psychological support. How the drug is given, the preparation before it, and follow-up therapy matter a lot. There are also safety and equity issues to watch: some psychedelics can have rare lasting side effects, many studies are small, and people of color have been underrepresented in trials. For now, exercise has the clearest and broadest evidence. Other treatments are promising but still need more testing and careful medical oversight.

Key findings

  • Many high-quality reviews find regular physical activity reduces anxiety by a medium amount across many trials. 8792
  • Walking specifically lowers anxiety symptoms compared with doing nothing, based on 26 randomized trials pooled together. 8785
  • Clinical trials and reviews report that psychedelic-assisted therapies (drugs given with therapy) reduced anxiety symptoms in people diagnosed with anxiety disorders. 15068 15063 15056
  • For post‑traumatic stress disorder (a trauma-related anxiety condition), MDMA given with psychotherapy produced large benefits in several controlled trials. 15063
  • Psychedelic drugs appear to change the brain in ways that could help anxiety and mood problems. Lab and imaging studies report increased brain plasticity (the brain’s ability to form new connections) and changes in inflammation and brain networks after substances like psilocybin, DMT, and other psychedelics. 15132 15050 15091 15135
  • Ketamine produces fast antidepressant effects and has been tested as an alternative to electroconvulsive therapy; it has also been studied for anxiety-related conditions in some trials. 10149 10160 15068
  • Most studies of psilocybin and other classic psychedelics are small and done with close medical and psychological support, so experts say larger, well‑controlled trials are still needed before routine use. 15056 15078
  • How people are prepared and supported matters a lot: many guides and reviews agree that screening, setting expectations, building trust, and follow‑up therapy are core parts of substance‑assisted psychotherapy. 15065 15092 15063
  • People of color were underrepresented in many psychedelic-assisted psychotherapy studies, which limits how well the results apply to different ethnic groups. 15095
  • There are risks to be aware of: rare but long-lasting perceptual problems (called HPPD) and other psychological or physical side effects have been reported after hallucinogen use, so safety monitoring is important. 15048 15087

Emotion-regulation strategies across psychopathology: A meta-analytic review

Amelia Aldao, Susan Nolen–Hoeksema, Susanne Schweizer
PubMed Summary & key facts 2010 6,290 citations

This meta-analysis combined 241 effect sizes from 114 studies to test how six habitual emotion-regulation strategies relate to symptoms of anxiety, depression, eating disorders, and substance-related problems. Rumination showed the strongest (large) link with symptoms. Avoidance, problem solving, and suppression showed medium-to-large links, while reappraisal and acceptance showed smaller (small-to-medium)…

Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes Child and Adolescent Psychosocial and Emotional Development Mental Health Research Topics

Effectiveness of physical activity interventions for improving depression, anxiety and distress: an overview of systematic reviews

Ben Singh, Tim Olds, Rachel Curtis, Dorothea Dumuid, Rosa Virgara, Amanda Watson, et al.
PubMed Summary & key facts 2023 784 citations

This umbrella review pooled evidence from 97 systematic reviews (1,039 randomized trials, 128,119 participants) to examine whether physical activity affects symptoms of depression, anxiety and psychological distress in adults. Overall, physical activity produced medium-sized reductions in symptoms (median effect size for depression = -0.43, for anxiety = -0.42; distress effect…

Behavioral Health and Interventions Eating Disorders and Behaviors Physical Activity and Health

Treatment‐resistant depression: definition, prevalence, detection, management, and investigational interventions

Roger S. McIntyre, Mohammad Alsuwaidan, Bernhard T. Baune, Michael Berk, Koen Demyttenaere, Joseph F. Goldberg, et al.
World Psychiatry Summary & key facts 2023 586 citations

Treatment-resistant depression means depression that does not get better after usual treatments. Scientists do not all agree on one clear definition, which makes it hard to know exactly how common it is or which treatments work best. Using the definition that regulators often use, about 30% of people with depression…

Electroconvulsive Therapy Studies Transcranial Magnetic Stimulation Studies Treatment of Major Depression Ketamine

Management of Treatment-Resistant Depression: Challenges and Strategies

Daphne Voineskos, Zafiris J. Daskalakis, Daniel M. Blumberger

This paper is a careful review of research about treatment-resistant depression. The authors looked through medical studies to see how doctors define this kind of depression, what makes it hard to assess, and which treatments have been tried. They describe drug strategies like adding lithium or thyroid hormone, switching antidepressant…

Electroconvulsive Therapy Studies Treatment of Major Depression Tryptophan and brain disorders Ketamine Psilocybin

Inclusion of people of color in psychedelic-assisted psychotherapy: a review of the literature

Timothy I. Michaels, Jennifer Purdon, Alexis Collins, Monnica T. Williams
BMC Psychiatry Summary & key facts 2018 247 citations

The authors reviewed psychedelic-assisted psychotherapy studies published from 1993 to 2017 to see how many people of color took part. They found 18 studies with about 280 people. About 82% of participants were non-Hispanic White, while only small percentages were African American, Latino, Asian, indigenous, or mixed race. Because so…

Natural Compound Pharmacology Studies Neurotransmitter Receptor Influence on Behavior Psychedelics and Drug Studies Ayahuasca LSD

The effectiveness of psychodynamic psychotherapies: An update

Peter Fonagy
World Psychiatry Summary & key facts 2015 241 citations

Researchers reviewed many outcome studies and meta-analyses of psychodynamic therapy, which is a type of talking therapy that explores feelings, relationships, and past experiences. They found that psychodynamic therapy often works better than doing nothing (for example being on a waitlist, getting only usual care, or a placebo) for depression,…

Mental Health and Psychiatry Personality Disorders and Psychopathology Psychotherapy Techniques and Applications

Canadian Network for Mood and Anxiety Treatments (CANMAT) 2023 Update on Clinical Guidelines for Management of Major Depressive Disorder in Adults: Réseau canadien pour les traitements de l’humeur et de l’anxiété (CANMAT) 2023 : Mise à jour des lignes directrices cliniques pour la prise en charge du trouble dépressif majeur chez les adultes

Raymond W. Lam, Sidney H. Kennedy, G. Camelia Adams, Anees Bahji, Serge Beaulieu, Venkat Bhat, et al.

The CANMAT 2023 update gives doctors clear, up-to-date advice for treating adults with major depressive disorder. It puts evidence into a practical, clinician-friendly format. The update says treatment should be a team effort between patients and clinicians, be tailored to each person, and follow a planned, systematic process with regular…

Mental Health Research Topics Treatment of Major Depression Tryptophan and brain disorders

Ketamine versus ECT for Nonpsychotic Treatment-Resistant Major Depression

Amit Anand, Sanjay J. Mathew, Gerard Sanacora, James W. Murrough, Fernando S. Goes, Murat Altinay, et al.
New England Journal of Medicine Summary & key facts 2023 233 citations

Researchers ran a clinical trial that directly compared ketamine treatment with electroconvulsive therapy (ECT) in people whose major depression had not improved with other treatments and who did not have psychosis. The trial found that ketamine was “noninferior” to ECT, which means ketamine worked at least as well as ECT…

Electroconvulsive Therapy Studies Treatment of Major Depression Tryptophan and brain disorders Ketamine

Psychedelics in Psychiatry: Neuroplastic, Immunomodulatory, and Neurotransmitter Mechanisms

Antonio Inserra, Danilo De Gregorio, Gabriella Gobbi
Pharmacological Reviews Summary & key facts 2020 215 citations

This review looked at many studies about classic psychedelics (like psilocybin and LSD), MDMA, ketamine, and plant medicines (like ayahuasca). The authors explain how these drugs can change the brain’s wiring, calm inflammatory processes, and shift key brain chemicals. Those actions may help explain why small clinical trials and animal…

Neurotransmitter Receptor Influence on Behavior Psychedelics and Drug Studies Tryptophan and brain disorders Ayahuasca Ketamine

Psychedelic Treatments for Psychiatric Disorders: A Systematic Review and Thematic Synthesis of Patient Experiences in Qualitative Studies

Joost J. Breeksema, Alistair Niemeijer, Erwin Krediet, Eric Vermetten, Robert A. Schoevers
CNS Drugs Summary & key facts 2020 207 citations

Researchers collected and read 15 studies where patients described their own experiences with psychedelic treatments for mental disorders. These studies looked at about 180 patient accounts across different drugs and different illnesses. Even though the drugs and treatment settings were very different, many patients described similar helpful processes, such as…

Chemical synthesis and alkaloids Neurotransmitter Receptor Influence on Behavior Psychedelics and Drug Studies Ayahuasca Ibogaine

Ketamine and rapid antidepressant action: new treatments and novel synaptic signaling mechanisms

John H. Krystal, Ege T. Kavalali, Lisa M. Monteggia
Neuropsychopharmacology Summary & key facts 2023 188 citations

This review explains how ketamine can lift depression symptoms much faster than standard antidepressants. Researchers describe the clinical results, how doctors usually give ketamine, and the brain changes it seems to cause. They also say that the treatment must be given carefully because small dose changes matter, the exact brain…

Neuroscience and Neuropharmacology Research Treatment of Major Depression Tryptophan and brain disorders Ketamine

Psychedelic medicine: a re-emerging therapeutic paradigm

Kenneth W. Tupper, Evan Wood, Richard Yensen, Matthew W. Johnson

Researchers around the world have started clinical studies again to see if psychedelic drugs can help treat serious mental health problems. This work picks up after research that stopped around the 1950s. Scientists are running controlled studies to test whether these substances can safely reduce problems like depression, anxiety, addiction…

Chemical synthesis and alkaloids Neurotransmitter Receptor Influence on Behavior Psychedelics and Drug Studies Ketamine LSD
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