BACKGROUND: Psychoactive serotonin 5-HT2A receptor agonists are potent modulators of awareness. Influential theories propose that psychedelics alter whole-brain dynamics by increasing neural signal diversity and dynamic flexibility. Beyond temporal variability, it is an open question whether psychedelics impact the characteristics of transient neural state sequences themselves. AIMS: Our goal...
, is a highly selective κ-opioid receptor agonist and a rare example of a κ-opioid receptor-mediated psychedelic drug. Preclinical work of salvinorin A has shown promising effects in neuropsychiatric animal models. However, human studies remain heterogeneous and fragmented, highlighting the need for synthesis. Thus, we conducted a systematic review to synthesize available human studies of...
Negative self-referential emotions such as embarrassment and shame play a key role in the psychopathology of psychiatric disorders but are often insufficiently addressed by standard treatments. Psychedelics such as ayahuasca - an Amazonian plant decoction containing the psychedelic N,N-dimethyltryptamine (DMT) and harmala alkaloids, have been proposed to positively modulate self-referential...
The research, understanding, and implementation of psychedelic therapies is characterised by a layered complexity that arises from the dynamic interactions between pharmacological and extra-pharmacological factors, and the embeddedness of psychedelics within broader societal, legal, and regulatory systems ill-equipped to accommodate them. This complexity is compounded by an epistemic...
Classical psychedelics such as N,N-dimethyltryptamine (DMT) modulate consciousness via serotonergic receptor agonism, and are increasingly investigated for their psychotherapeutic potential. When combined with the monoamine oxidase A (MAO-A) inhibitor harmine-mimicking the pharmacological profile of ayahuasca-oral DMT induces a psychedelic experience lasting 4-5 h. While some neuroimaging...
Classical psychedelics such as N,N -dimethyltryptamine (DMT) modulate consciousness via serotonergic receptor agonism, and are increasingly investigated for their psychotherapeutic potential. When combined with the monoamine oxidase A (MAO-A) inhibitor harmine—mimicking the pharmacological profile of ayahuasca—oral DMT induces a psychedelic experience lasting 4–5 h. While some neuroimaging...
The acute subjective effects (ASEs) of psychedelic substances are assumed to play a critical role for their therapeutic and well-being enhancing benefits. However, recent work voiced critique regarding the validity and adequacy of conventional measures and modalities utilized to study ASEs of psychedelics, and call for data-driven, unbiased, and experience-based research approaches. The...
Classical psychedelics such as N,N-dimethyltryptamine (DMT) modulate consciousness via serotonergic receptor agonism, and are increasingly investigated for their psychotherapeutic potential. When combined with the monoamine oxidase A (MAO-A) inhibitor harmine—mimicking the pharmacological profile of ayahuasca—oral DMT induces a psychedelic experience lasting 4–5 h. While some neuroimaging...
Abstract Classic serotonergic psychedelics are potent modulators of conscious awareness, yet the principles governing their effects on the temporal dynamics of brain activity remain unclear. Dominant theories propose that psychedelics increase the signal diversity and metastability of neural states, but whether this reflects a simple randomization of activity or a more structured reorganization...
Salvinorin A, the main psychoactive compound of Salvia divinorum, is a potent and selective kappa opioid receptor agonist. While human clinical trials remain limited, animal studies suggest potential therapeutic applications in neurological and psychiatric disorders. This systematic review and meta-analysis aims to synthesize these preclinical findings, addressing three questions: (1) What is...
Background: Salvinorin A, the main psychoactive compound of Salvia divinorum, is a potent and selective kappa opioid receptor agonist. While human clinical trials remain limited, animal studies suggest potential therapeutic applications in neurological and psychiatric disorders. This systematic review and meta-analysis aims to synthesize these preclinical findings, addressing three questions:...
Meditation, psychedelics, and brain connectivity: A randomized controlled resting-state fMRI study of N,N-dimethyltryptamine and harmine in a meditation retreat.
Both meditation and psychedelics are widely studied for their therapeutic potential in mental health. Recent research suggests potential synergies between mindfulness practice and psychedelics, though empirical studies have primarily focused on psilocybin. This study investigates the distinct and combined effects of mindfulness practice and an ayahuasca-inspired formulation containing...
While psychedelics are often claimed to enhance creativity, their precise effects on distinct stages of creative cognition remain poorly understood. This study investigated the acute effects of an ayahuasca-inspired formulation combining N,N-dimethyltryptamine (DMT) and harmine (DMT/HAR), as well as harmine alone (HAR), on micro-level (divergent/convergent thinking) and macro-level (creative...
Background: While psychedelics are often claimed to enhance creativity, their precise effects on distinct stages of creative cognition remain poorly understood. This study investigated the acute effects of an ayahuasca-inspired formulation combining N,N-dimethyltryptamine (DMT) and harmine (DMT/HAR), as well as harmine alone (HAR), on micro-level (divergent/convergent thinking) and macro-level...
Abstract Classical psychedelics such N,N -dimethyltryptamine (DMT), psilocybin, and lysergic acid diethylamide (LSD) modulate consciousness via serotonergic receptor agonism, and are increasingly investigated for their psychotherapeutic potential. When combined with the monoamine oxidase A (MAO-A) inhibitor harmine—mimicking the pharmacological profile of ayahuasca—oral DMT induces a...
N,N-dimethyltryptamine (DMT) is a psychedelic compound commonly co-administered with the monoamine oxidase inhibitor harmine in ayahuasca-inspired formulations. However, the impact of harmine on DMT pharmacokinetics (PK) and pharmacodynamics (PD) remains insufficiently characterized. In this single-blind, randomized, two-arm, factorial, dose-finding study, 16 healthy participants (9 males, 7...
Mindfulness and compassion are therapeutically relevant and can be increased through different forms of meditation practices. However, meditation practice needs time and commitment. These resources are often limited in patients with mood disorders. Therefore, efficacious remedies that increase mindfulness and compassion could provide therapeutic options. This study aimed to investigate the...
Background: Mindfulness and compassion are therapeutically relevant and can be increased through different forms of meditation practices. However, meditation practice needs time and commitment. These resources are often limited in patients with mood disorders. Therefore, efficacious remedies that increase mindfulness and compassion could provide therapeutic options. This study aimed to...
Psychedelics are known to profoundly alter perception and self-referential processing, yet their specific effects on face recognition -particularly with regard to the recognition of face familiarity-remain underexplored. This study investigates the effects of an ayahuasca-inspired novel DMT/HAR (N,N-dimethyltryptamine/Harmine) formulation and Harmine alone on face recognition and...
Ayahuasca, a traditional psychoactive Amazonian brew, usually contains N,N-dimethyltryptamine (DMT) and β-carboline (harmine, harmaline, tetrahydroharmine) monoamine oxidase inhibitors. However, the pharmacological interactions between these compounds remain incompletely understood. In this study, we developed an ayahuasca-inspired formulation containing DMT and harmine, aiming to...
Recent interest in the clinical use of psychedelics has highlighted plant-derived medicines like ayahuasca showing rapid-acting and sustainable therapeutic effects in various psychiatric conditions. This traditional Amazonian plant decoction contains N,N-dimethyltryptamine (DMT) and β-carboline alkaloids such as harmine. However, its use is often accompanied by distressing effects like nausea,...
Background: In recent years, both meditation and psychedelics have attracted rapidly increasing scientific interest. While the current state of evidence suggests the promising potential of psychedelics, such as psilocybin, to enhance meditative training, it remains equivocal whether these effects are specifically bound to psilocybin or if other classical psychedelics might show synergistic...
The potent hallucinogen N,N-dimethyltryptamine (DMT) has garnered significant interest in recent years due to its profound effects on consciousness and its therapeutic psychopotential. DMT is an integral (but not exclusive) psychoactive alkaloid in the Amazonian plant-based brew ayahuasca, in which admixture of several β-carboline monoamine oxidase A (MAO-A) inhibitors potentiate the activity...
Abstract Two views on psychedelic experiences include realism and idealism. While a realist view suggests that psychedelic experiences reveal a pre-given world to us, an idealist view suggests they are mere projections of a pre-given mind. This chapter highlights and contrasts their common tendency towards grasping and representations. It presents a promising alternative that aims at going...