Research Keyword: 5-HT2A receptor

Improved mental health outcomes and normalised spontaneous EEG activity in veterans reporting a history of traumatic brain injuries following participation in a psilocybin retreat

Researchers studied how psilocybin mushrooms given in a retreat setting could help military veterans with traumatic brain injuries who also experienced mental health problems like PTSD and depression. Veterans participated in guided psilocybin ceremonies and showed significant improvements in depression, anxiety, and overall quality of life, along with positive changes in their brain activity patterns measured by EEG. The study suggests that psilocybin retreats may be a promising therapeutic approach for this vulnerable population and supports the need for larger research studies.

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Psychedelic Drugs or Hallucinogens: Exploring Their Medicinal Potential

Psychedelic drugs like LSD and psilocybin are substances that alter perception and consciousness. Research shows they may help treat serious mental health conditions including depression, anxiety, and PTSD by affecting how the brain forms new connections. These substances are relatively safe compared to many legal drugs, and scientists believe they could revolutionize mental health treatment when used properly under medical supervision.

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Sex-specific effects of psychedelic drug exposure on central amygdala reactivity and behavioral responding

Researchers studied how psilocybin’s active form affects the brain’s fear center in both male and female rats. They found that a single dose produced different effects in males versus females, with males showing lasting reductions in fear responses over 28 days while females showed variable changes. These findings help explain why psychedelics might work differently between sexes and could inform how they’re used to treat anxiety and depression in humans.

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Acute Effects of Psilocybin After Escitalopram or Placebo Pretreatment in a Randomized, Double-Blind, Placebo-Controlled, Crossover Study in Healthy Subjects

This study examined whether taking the antidepressant escitalopram before using psilocybin affects the drug’s effects. Twenty-three healthy participants took either escitalopram or placebo for two weeks, then received a dose of psilocybin. Surprisingly, escitalopram did not reduce the positive mood effects of psilocybin and actually reduced some negative side effects like anxiety and bad feelings. The combination appeared safe with no increased cardiovascular risks.

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Synergistic, multi-level understanding of psychedelics: three systematic reviews and meta-analyses of their pharmacology, neuroimaging and phenomenology

This comprehensive study analyzed three classic psychedelic drugs—LSD, psilocybin (from magic mushrooms), and DMT—across three levels: how people experience them, how they affect brain activity, and how they interact with brain receptors. Researchers found that LSD produces more intense visual experiences than psilocybin, and all three drugs significantly alter brain connectivity patterns. The study highlights the importance of standardizing research methods to better understand how these compounds might help treat depression and addiction.

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The Bright Side of Psychedelics: Latest Advances and Challenges in Neuropharmacology

Researchers are rediscovering psychedelic compounds from traditional plants and fungi as potential treatments for mental health conditions and addiction. These substances work by interacting with brain chemistry, particularly serotonin systems, to reduce symptoms of depression, anxiety, and drug cravings. Recent clinical studies show promising results, especially for treating opioid addiction with single doses that can produce lasting improvements. However, more rigorous clinical trials are needed to fully understand how these compounds work and to establish safe, effective therapeutic protocols.

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Down the rabbit hole – the psychological and neural mechanisms of psychedelic compounds and their use in treating mental health and medical conditions

Psychedelic compounds like psilocybin and LSD are showing significant promise for treating various mental health conditions including depression, anxiety, and PTSD. These substances appear to work through multiple mechanisms, including inducing profound mystical experiences and increasing neuroplasticity in the brain. Research indicates that environmental and contextual factors significantly influence how effective these treatments are, and even virtual reality experiences mimicking psychedelic effects show therapeutic benefits. The field is moving toward responsible, evidence-based clinical applications of psychedelics in psychiatry.

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Comparing Antidepressant Effects of Psilocybin-Assisted Psychotherapy in Individuals That Were Unmedicated at Initial Screening Versus Individuals Discontinuing Medications for Study Participation

This study compared how well psilocybin therapy works for people with treatment-resistant depression depending on whether they were already off antidepressants or had stopped taking them for the study. The researchers found that both groups improved similarly in depression and anxiety symptoms after receiving psilocybin with therapy support. These results suggest that stopping antidepressants before psilocybin treatment may not reduce its effectiveness, though more research is needed to fully understand the relationship between medication status and treatment outcomes.

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The therapeutic potential of microdosing psychedelics in depression

This review examines whether taking very small doses of psychedelic drugs like LSD and psilocybin might help treat depression. While users report benefits and some studies show subtle positive effects on mood and thinking, scientists have not yet confirmed whether microdosing actually works as a depression treatment. More research with depressed patients is needed to understand if this approach is truly helpful and safe for regular use.

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Ketanserin Reverses the Acute Response to LSD in a Randomized, Double-Blind, Placebo-Controlled, Crossover Study in Healthy Participants

Researchers tested whether ketanserin, a drug that blocks serotonin receptors, could stop or reverse an LSD experience once it had already started. In a controlled study with healthy volunteers, ketanserin given one hour after LSD administration cut the duration of the LSD experience from 8.5 hours down to 3.5 hours and eliminated visual and auditory hallucinations. This finding suggests ketanserin could be useful as an emergency medication in psychedelic-assisted therapy to help patients who have negative reactions to LSD.

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