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Low Doses of LSD Acutely Increase BDNF Blood Plasma Levels in Healthy Volunteers

March 16, 2022 / LSD, Neuroscience, Papers / Leave a Comment / By / , , , , , , , , , ,

Abstract

Despite preclinical evidence for psychedelic-induced neuroplasticity, confirmation in humans is grossly lacking. Given the increased interest in using low doses of psychedelics for psychiatric indications and the importance of neuroplasticity in the therapeutic response, this placebo-controlled within-subject study investigated the effect of single low doses of LSD (5, 10, and 20 μg) on circulating BDNF levels in healthy volunteers. Blood samples were collected every 2 h over 6 h, and BDNF levels were determined afterward in blood plasma using ELISA. The findings demonstrated an increase in BDNF blood plasma levels at 4 h (5 μg) and 6 h (5 and 20 μg) compared to that for the placebo. The finding that LSD acutely increases BDNF levels warrants studies in patient populations.

Hutten, N., Mason, N. L., Dolder, P. C., Theunissen, E. L., Holze, F., Liechti, M. E., Varghese, N., Eckert, A., Feilding, A., Ramaekers, J. G., & Kuypers, K. (2020). Low Doses of LSD Acutely Increase BDNF Blood Plasma Levels in Healthy Volunteers. ACS pharmacology & translational science, 4(2), 461–466. https://doi.org/10.1021/acsptsci.0c00099

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The therapeutic potential of microdosing psychedelics in depression

November 18, 2021 / Depressive Disorders, LSD, Microdosing, Mushrooms / Psilocybin, Papers, Psychology / Leave a Comment / By /

Abstract

Microdosing psychedelics is the repeated use of small doses of, for example, lysergic acid diethylamide (LSD) and psilocybin, typically for a few weeks. Despite the popular and scientific attention in recent years, and claims by users that it has therapeutic value in affective disorders like depression, little scientific knowledge is available to back this. The purpose of this review was to investigate whether there are scientific grounds to state that this practice could be helpful in the treatment of affective disorders, and safe to use repeatedly. To that end, the literature (PubMed, MedLine) was searched, looking for (controlled) experimental studies with low doses of LSD and/or psilocybin, in healthy volunteers and patient samples. After a selection process and the addition of relevant articles, 14 experimental studies entered this review. Findings show that both LSD (10-20 mcg) and psilocybin (<1-3 mg) have subtle (positive) effects on cognitive processes (time perception, convergent and divergent thinking) and brain regions involved in affective processes. Besides the pleasant experience, increased anxiety and a cycling pattern of depressive and euphoric mood were also found. With regard to safety, it was demonstrated that low doses are well tolerated (in healthy volunteers) and have no-to-minimal effects on physiological measures. While it is yet unclear whether psychedelic microdosing is of therapeutic value for depression, the aforementioned effects on selective processes suggest that low doses of psychedelics could play a role in depression by inducing some kind of cognitive flexibility, which might lead to decreased rumination. While previous studies were conducted mostly in small samples of healthy volunteers, future placebo-controlled clinical trials in depressed patients are required to understand the therapeutic value of microdosing psychedelics, how this differs from therapy using full psychedelic doses, and whether different psychedelics have different effect patterns. The proposed research will give new insights into the potential of future alternative psychiatric treatment forms that are fiercely needed.

Kuypers K. (2020). The therapeutic potential of microdosing psychedelics in depression. Therapeutic advances in psychopharmacology, 10, 2045125320950567. https://doi.org/10.1177/2045125320950567

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A low dose of lysergic acid diethylamide decreases pain perception in healthy volunteers

August 25, 2020 / LSD, Papers, Psychiatry & Medicine, Publications / By / , , , , , ,

Abstract

Background: Lysergic acid diethylamide (LSD) is an ergot alkaloid derivative with psychedelic properties that has been implicated in the management of persistent pain. Clinical studies in the 1960s and 1970s have demonstrated profound analgesic effects of full doses of LSD in terminally ill patients, but this line of research evaporated after LSD was scheduled worldwide.

Aim: The present clinical study is the first to revisit the potential of LSD as an analgesic, and at dose levels which are not expected to produce profound mind-altering effects.

Methods: Twenty-four healthy volunteers received single doses of 5, 10 and 20 µg LSD as well as placebo on separate occasions. A Cold Pressor Test was administered at 1.5 and 5 h after treatment administration to assess pain tolerance to experimentally evoked pain. Ratings of dissociation and psychiatric symptoms as well as assessments of vital signs were included to monitor mental status as well as safety during treatments.

Results: LSD 20 µg significantly increased the time that participants were able to tolerate exposure to cold (3°C) water and decreased their subjective levels of experienced pain and unpleasantness. LSD elevated mean blood pressure within the normal range and slightly increased ratings of dissociation, anxiety and somatization.

Conclusion: The present study provides evidence of a protracted analgesic effect of LSD at a dose that is low enough to avoid a psychedelic experience. The present data warrant further research into the analgesic effects of low doses of LSD in patient populations.

Ramaekers, J. G., Hutten, N., Mason, N. L., Dolder, P., Theunissen, E. L., Holze, F., … & Kuypers, K. P. (2020). A low dose of lysergic acid diethylamide decreases pain perception in healthy volunteers. Journal of Psychopharmacology, 0269881120940937; 10.1177/0269881120940937
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Psychedelics as a Treatment for Alzheimer’s Disease Dementia

January 3, 2022 / LSD, Microdosing, Mushrooms / Psilocybin, Neuroscience, Papers / Leave a Comment / By / ,

Abstract

Currently, there are no disease-modifying treatments for Alzheimer’s disease (AD) or any other dementia subtype. The renaissance in psychedelic research in recent years, in particular studies involving psilocybin and lysergic acid diethylamide (LSD), coupled with anecdotal reports of cognitive benefits from micro-dosing, suggests that they may have a therapeutic role in a range of psychiatric and neurological conditions due to their potential to stimulate neurogenesis, provoke neuroplastic changes and reduce neuroinflammation. This inevitably makes them interesting candidates for therapeutics in dementia. This mini-review will look at the basic science and current clinical evidence for the role of psychedelics in treating dementia, especially early AD, with a particular focus on micro-dosing of the classical psychedelics LSD and psilocybin.

Vann Jones, S. A., & O’Kelly, A. (2020). Psychedelics as a Treatment for Alzheimer’s Disease Dementia. Frontiers in synaptic neuroscience, 12, 34. https://doi.org/10.3389/fnsyn.2020.607194

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

August 17, 2020 / Anxiety Disorders / PTSD, Ayahuasca, Depressive Disorders, Iboga / Ibogaine, Ketamine, LSD, MDMA, Mushrooms / Psilocybin, Neuroscience, Papers, Psychology, Publications, Substance Use Disorder / By / , , , ,

Abstract

Introduction: Interest in the use of psychedelic substances for the treatment of mental disorders is increasing. Processes that may affect therapeutic change are not yet fully understood. Qualitative research methods are increasingly used to examine patient accounts; however, currently, no systematic review exists that synthesizes these findings in relation to the use of psychedelics for the treatment of mental disorders.

Objective: To provide an overview of salient themes in patient experiences of psychedelic treatments for mental disorders, presenting both common and diverging elements in patients’ accounts, and elucidating how these affect the treatment process.

Methods: We systematically searched the PubMed, MEDLINE, PsycINFO, and Embase databases for English-language qualitative literature without time limitations. Inclusion criteria were qualitative research design; peer-reviewed studies; based on verbalized patient utterances; and a level of abstraction or analysis of the results. Thematic synthesis was used to analyze and synthesize results across studies. A critical appraisal of study quality and methodological rigor was conducted using the Critical Appraisal Skills Programme (CASP).

Results: Fifteen research articles, comprising 178 patient experiences, were included. Studies exhibited a broad heterogeneity in terms of substance, mental disorder, treatment context, and qualitative methodology. Substances included psilocybin, lysergic acid diethylamide (LSD), ibogaine, ayahuasca, ketamine and 3,4-methylenedioxymethamphetamine (MDMA). Disorders included anxiety, depression, eating disorders, post-traumatic stress disorder, and substance use disorders. While the included compounds were heterogeneous in pharmacology and treatment contexts, patients reported largely comparable experiences across disorders, which included phenomenological analogous effects, perspectives on the intervention, therapeutic processes and treatment outcomes. Comparable therapeutic processes included insights, altered self-perception, increased connectedness, transcendental experiences, and an expanded emotional spectrum, which patients reported contributed to clinically and personally relevant responses.

Conclusions: This review demonstrates how qualitative research of psychedelic treatments can contribute to distinguishing specific features of specific substances, and carry otherwise undiscovered implications for the treatment of specific psychiatric disorders.

Breeksema, J. J., Niemeijer, A. R., Krediet, E., Vermetten, E., & Schoevers, R. A. (2020). Psychedelic treatments for psychiatric disorders: a systematic review and thematic synthesis of patient experiences in qualitative studies. CNS drugs, 1-22; 10.1007/s40263-020-00748-y

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The rise, fall, and possible rise of LSD

August 1, 2020 / Anxiety Disorders / PTSD, Depressive Disorders, Humanities & Art, LSD, Papers, Publications, Substance Use Disorder / By / ,

Abstract

LSD and other hallucinogens or psychedelics have been therapeutically used in psychiatry in the period between the Second World War and the late 1980s. In the past years renewed interest in the medical sciences for research and therapeutic use of these substances has evolved. AIM: A discussion of contemporary lsd research in the context of earlier research. METHOD: A systematic survey of the literature on the psychiatric use of lsd and the reactions towards lsd use in society. RESULTS: Since 1947 lsd has been therapeutically used in the treatment of anxiety, depression, addiction, post traumatic disorders, and other conditions. Since the early 1960s this use has been criticized because of the danger of evoking psychoses in patients, and because of the rise of a widespread non-medical use. However, there is no consolidated evidence-base for either the positive or the negative outcomes of lsd therapy. CONCLUSION: At this moment it is unpredictable whether lsd will make a comeback in psychiatry. Contemporary research attempts to evade all public controversy and to build up a solid evidence-base. Nevertheless it demonstrates a direct continuity with earlier research.

Snelders, S., & Pieters, T. (2020). The rise, fall, and possible rise of LSD. Tijdschrift Voor Psychiatrie, 62(8), 707-712.
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[Psychedelics for existential distress in terminally ill patients]

August 1, 2020 / Anxiety Disorders / PTSD, Depressive Disorders, Ketamine, LSD, MDMA, Mushrooms / Psilocybin, Papers, Psychology, Publications / By / , , , ,

Abstract

Existential distress in patients with a terminal illness is often associated with (symptoms of) anxiety and depression. Psychotherapeutic interventions seem effective but effects are short-lived. There are no proven effective pharmacological interventions.<br/> AIM: To present an overview of literature on psychedelic treatment of existential distress in patients with terminal illness.<br/> METHOD: Literature research in PubMed/Medline databases, supplemented with cross-references.<br/> RESULTS: 14 clinical studies have been conducted: 6 with classic psychedelics between 1960 and 1980, and 8 with classic psychedelics and ketamine after 2000. Results of early pre-post studies are promising but have serious methodological limitations. Recent clinical research with LSD, psilocybin and ketamine are also promising although limited in terms of research design and generalizability. Overall, studies show a positive effect on existential and spiritual well-being, quality of life, acceptance and (symptoms of) anxiety and depression. Mystical experiences are correlated with positive outcomes. Few adverse effects are reported.<br/> CONCLUSION: Treatment of existential distress using classical psychedelics or ketamine in patients with terminal illness seems auspicious. Larger clinical studies in a more diverse patient population with fewer methodological limitations are needed to draw conclusions about efficacy and generalizability.
Schimmel, N., Breeksema, J. J., Veraart, J. K. E., van den Brink, W., & Schoevers, R. A. (2020). Psychedelics for existential distress in terminally ill patients. Tijdschrift Voor Psychiatrie, 62(8), 659-668., https://europepmc.org/article/med/32816294
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Microdosing with psychedelics: what do we know?

August 1, 2020 / LSD, Microdosing, Mushrooms / Psilocybin, Papers, Psychology, Publications / By /

Abstract

The repeated use of small doses of psychedelics such as psilocybin and lsd over a period of time (microdosing, md) has gained popularity and scientific attention in recent years. Retrospective reports from users suggest clinical potential.<br/> AIM: To answer the question whether md with psychedelics could theoretically provide symptom relief for people with psychiatric disorders. <br/> METHOD: Investigate what the current evidence is about the effects of md with psychedelics on the behavioral level, psychological functioning and mental well-being. A search for relevant articles in PubMed and Medline databases (on January 10, 2020), which resulted in a total of 28 hits. After de-duplication, removal of irrelevant and addition of relevant articles, 23 articles were included.<br/> RESULTS: Most of the knowledge we have so far comes from uncontrolled online questionnaire studies in which users report retrospectively or keep diaries of the effects they experience during md. According to users, it leads to positive effects on mood, concentration, focus and productivity. Negative effects, including physical discomfort and increased fear, also seem to occur. The limited number of experimental studies in healthy people revealed that md has subtle effects on cognitive processes and brain connectivity.<br/> CONCLUSION: The findings of experimental studies in combination with the reports from users give cause for further investigation into the clinical potential of low-dose psychedelics in combating certain symptoms. More placebo-controlled studies are needed to provide clarity for who (age, diagnosis) md can be effective and for which (cognitive, emotional) processes.
Kuypers, K. P. C. (2020). Microdosing with psychedelics: what do we know?. Tijdschrift Voor Psychiatrie, 62(8), 669-676., https://pubmed.ncbi.nlm.nih.gov/32816295/

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[Psychedelics in the treatment of PTSD]

August 1, 2020 / Anxiety Disorders / PTSD, Depressive Disorders, Ketamine, LSD, MDMA, Papers, Psychology, Publications / By / , , , , ,

Abstract

Posttraumatic stress disorder (PTSD) is often a chronic condition, despite the availability of various evidence-based treatment options. Psychedelics offer new treatment opportunities.<br/> AIM: An overview of the current evidence, therapeutic context, and possible mechanisms of action of different types of psychedelics in the treatment of PTSD.<br/> METHOD: A scoping review of the available literature.<br/> RESULTS: MDMA-assisted psychotherapy has shown to produce lasting reductions in PTSD symptoms in multiple RCTs. Based on a small number of studies, ketamine administration appears to lead to temporary symptom relief. Current studies are investigating whether the use of ketamine in combination with psychotherapy can lead to lasting reductions in PTSD symptoms. Classical psychedelics (such as psilocybin and LSD) induce psychoactive effects (on behavior or experience) that could contribute to the psychotherapeutic treatment of PTSD but have not yet been investigated in controlled studies. Reported positive effects extend beyond PTSD symptoms only.<br/> CONCLUSION: Psychedelics may have potential to serve as a catalyst for the psychotherapeutic treatment of PTSD. Most evidence exists for MDMA-supported psychotherapy; relatively little research is available on ketamine and classical psychedelics. Future research needs to show whether the use of psychedelics can be integrated into available treatment options for PTSD.
Vermetten, E., Krediet, E., Bostoen, T., Breeksema, J. J., Schoevers, R. A., & van den Brink, W. (2020). Psychedelics in the treatment of PTSD. Tijdschrift Voor Psychiatrie, 62(8), 640-649., https://pubmed.ncbi.nlm.nih.gov/32816292/

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The Current Status of Psychedelics in Psychiatry

July 29, 2020 / Humanities & Art, LSD, Papers, Publications / By / ,

Abstract

In the 1950s, the Swiss pharmaceutical company Sandoz, which employed the chemist Albert Hofmann, who discovered lysergic acid diethylamide (LSD) and the similar serotonergic psychedelic psilocybin, made these drugs available to the psychiatric research community as the products Delysid and Indocybin, respectively. By the 1960s, these drugs had caused a revolution in brain science and psychiatry because of their widespread use by researchers and clinicians in many Western countries, especially the US. Before LSD was banned, the US National Institutes of Health funded more than 130 studies exploring its clinical utility, with positive results in a range of disorders but particularly anxiety, depression, and alcoholism. However, the displacement of LSD into recreational use and eventual association with the anti-Vietnam war movement led to all psychedelics being banned in the US. This ban became ratified globally under the 1971 UN Convention on narcotics. Since then, research funding, drug production, and the study of psychedelics as clinical agents has been virtually stopped. Until very recently, no companies would manufacture medical-grade psychedelics, which made getting regulatory approval for clinical research—especially clinical trials—very difficult and in some countries (eg, Germany) impossible.

Nutt, D., & Carhart-Harris, R. (2021). The current status of psychedelics in psychiatry. JAMA psychiatry, 78(2), 121-122.; 10.1001/jamapsychiatry.2020.2171
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