Non-dissociative hallucinogens Flashcards
Psilocybin and metabolite
magic mushrooms, ingested and metabolized into psilocin, a psychoactive compound
Mescaline
from peyote cactus, similar to LSD but 1/2000 less potent
DMT
South American plant that when smoked or snorted produces a brief (30 min) but intense hallucinatory experience
Ayahuasca
drink with DMT + beta-carbolines (MAOIs) which probably block breakdown of DMT
LSD
synthetic hallucinogen derived from ergot fungus on rye
Historical uses of LSD
psycholytic therapy (psychic loosening or opening), psychedelic therapy (high doses to gain insight into problems)
Salvinorin A administration
smoking or chewing, leading to buccal absorption; swallowing has no effect
251-NBOMe
usually taken orally, very potent and easy to overdose; causes agitation, heart props, seizures, kidney failure
Ibogaine
low dose psychostimulant, high dose psychedelic
Stages of a trip
onset, plateau, peak, comedown
Trip effects
vivid visual hallucinations, slowing sense of time, depersonalization, synesthesia, can be good or bad depending on expectations and environment
Indoleamine hallucinogens
structurally similar to 5-HT; LSD, psilocybin, DMT, 5-MeO-DMT, ibogaine
Phenethylamine hallucinogens
structurally similar to NE; mescaline, NBOMes, DOM
Time course
LSD, mushrooms, peyote starts after 30-90 minutes and lasts 6-12 hours; DMT, salvia starts in minutes and ends in 30-60 minutes
Role of 5-HT2A
activation of 5-HT2A leads to psychoactive effect
Salvinorin A pharmacodynamics
kappa-opioid agonist
Neural mechanism that creates hallucinations
trigger population of glutamatergic pyramidal neurons in the PFC, prolonged EPSPs lead to increased glutamatergic signaling
BDNF
psilocin and 5-HT2A receptor agonists increase BDNF in prefrontal and limbic regions, may increase neuroplasticity
Mood treatments
peak experience is the desired subjective state, followed by an afterglow lasting days to weeks, explored to treat mood disorders
Psilocybin for cancer patients
reduced anxiety, pain, and increased positive affect; mediated by rapid glutamate-dependent neural plasticity