Despite renewed investigations into classical psychedelic compounds, their pharmacokinetic profiles remain incompletely understood. This systematic review collated data from healthy adult volunteers on the pharmacokinetic properties of lysergic acid diethylamide (LSD), psilocybin, dimethyltryptamine (DMT), mescaline, and 5-methoxy-N,N-dimethyltryptamine (5-MEO-DMT). We identified 32 eligible...
Encounters with apparently autonomous and intelligent non-human entities are a striking and recurrent feature of high-dose N,N-dimethyltryptamine (DMT) experi-ences. Such encounters are typically interpreted as complex hallucinations derived from internally generated brain activity, although many features of the DMT state remain a challenge to explain within the standard neuroscientific...
High Resolution Image Download MS PowerPoint Slide Tryptamine psychedelics induce psychoactive effects via agonist actions at serotonin 2A receptors (5-HT 2A ), but the compounds are generally nonselective. 4-Methoxy- N -methyl- N -isopropyltryptamine (4-MeO-MiPT) is a 5-HT 2A agonist which also blocks the 5-HT transporter (SERT) and has blunted visual and other psychedelic effects in humans....
A ayahuasca é uma bebida de origem tradicionalmente indígena, sua preparação resulta da associação de duas espécies vegetais principais: Banisteriopsis caapi, rica em alcaloides β-carbolínicos (harmina, harmalina e tetrahidro-harmina), e Psychotria viridis, que contém a N,N-dimetiltriptamina (DMT). Essa combinação promove efeitos psicotrópicos característicos devido à inibição da monoamina...
Minimal Phenomenal Experiences (MPEs) are states of consciousness in which wakefulness is preserved but phenomenal content is low or absent. The Entropic Brain Hypothesis (EBH) is a model of conscious processes that regards the entropy of spontaneous brain activity as a marker of 'phenomenal richness', exemplified by high-content psychedelic experiences (HCPEs). Yet recent human neuroimaging...
Phương pháp sắc ký lỏng ghép khối phổ hai lần (LC-MS/MS) đã được xây dựng và thẩm định nhằm định lượng đồng thời 04 chất ma túy nhóm tryptamin thế vị trí số 4 trên vòng indol (psilocin, psilocybin, 4-acetoxy-N,N-dimethyltryptamin (4-AcO-DMT), 4-hydroxy-N,N-diisopropyltryptamin (4-OH-DiPT)) và chất chuyển hóa acid 4-hydroxyindol-3-acetic (4-HIAA) trong huyết tương người. Quá trình tách được thực...
BACKGROUND: Preliminary evidence examining ibogaine in neuropsychiatric and substance use disorders is accumulating. As patient interest and off-label use grow, clinicians require an understanding of emerging dosing strategies, investigational protocols, and reported adverse effects to appropriately counsel patients and contextualize potential risks and benefits. METHODS: Databases were...
Electroencephalographic (EEG) microstates provide a compact framework for characterizing the temporal organization of large-scale brain activity, yet their sensitivity to altered brain states remains insufficiently explored. In this study, we applied broadband and frequency-resolved EEG microstate analysis to resting-state EEG data from two publicly available datasets acquired under markedly...
bioRxivMay 4, 2026Tomás Ariel D’amelio, Tomás Gil Garbagnoli, Jerónimo Rodríguez Cuello et al.
preprint
ABSTRACT Serotonergic psychedelics induce altered states of consciousness characterised by profound changes in emotional experience. Although psychedelics modulate autonomic arousal, sympathetic engagement during their affective effects remains poorly characterised. We recorded cardiac, electrodermal, and respiratory activity in 19 participants following inhalation of 20 or 40 mg of freebase...
Serotonergic psychedelics are being investigated in the treatment of various disorders and in the improvement of well-being. Evidence suggests that their subjective effects may play a role in long-term behavioral outcomes. The subjective effects are mediated by 5-HT2A receptor agonism, but the 5-HT1A receptor may also play a role in the subjective effects. This study elucidates the effects of...