Lecture 12: Psychedelic Drugs Flashcards
3 categories of psychedelics
- true psychedelics
- mixed psychedelic-stimulant drugs
- abused deliriants
most psych drugs structurally resemble (3)
- acetylcholine
- catecholamines (NE, DA)
- indolamines (serotonin)
5 types of psych drugs
- anti-cholinergic
- catecholamine-like
- serotonin-like
- NMDA eceptor antagonists
- opioid kappa receptor antagonists
ex. of anticholinergic psych drug
scopolamine
ex. of catecholamine-like psychedelic drug
mescaline
ex. of serotonin-like
LSD
ex. of glutaminergic NMDA receptor antag
PCP, ketamine, DXM
ex. of opioid kappa receptor agonist
salvinorin A
MoA of scopolamine
muscarinic antagonist
scopolamine category
anticholinergic
4 CNS effects of scopolamine
- sedation
- cog impairment
- amnesia
- delirium
7 PNS effects of scopolamine
- dry mouth/skin
- reduced sweating
- increased body temp
- dilated pupils
- blurred vision
- tachycardia
- hypertension
8 low dose effects of scopolamine
- drowsiness
- mild euphoria
- amnesia
- delirium
- confusion
- dreamless sleep
- loss of attention
5 higher dose effects of scopolamine
- delirium
- confusion
- stupor
- coma
- respiratory depression
how long for scopolamine effects to clear
36-48 hours
3 catecholamine-like psychedelics
- mescaline
- MDMA
- nutmeg
what structural distinctions are present in catecholamine-like psychedelics?
metoxy groups
catechol-like psychs exert __ and ___ action
stimulant and hallucinogenic
psych actions of catechol occur by augmenting
serotonergic neurotransmission; agonists at 5-HT2A postsynaptic receptors
catechol can also be thought of as mixed ___ and ___ agonists
DA and 5HT
mescaline comes from ___
peyote cactus
mescaline structurally resembles
NE
mescaline psych effects due to ___ action at ___
agonistic
5HT2A
when administered orally, mescaline is ___ absorbed
completely and rapidly
when is significant concentration of mescaline reached?
1-2 hours
when are acute psychomimetic states reached from mescaline?
3-4 hours
where are the most prominent effects of mescaline?
visual system
how long does one dose of mescaline last?
10 hours
what pattern on brain does mescaline cause?
hyperfrontal
6 effects of mescaline oral dose
- visual hallucinations
- anxiety
- impaired space perception
- dissolution of ego boundaries
- sympathomimetic effects
- hyperreflexia of limbs and tremors
at low doses, synthetic amphetamine derivatives are a ___
moderate behavioral stimulant
at high doses, synth amphet derivs have __ effect
psychedelic
DOM is ___ more potent than mescaline
100x
3 toxic reactions to DOM
- tremors/convulsions
- prostration
- death
synthetic amphet derivatves last for ___
6-8 hours, hallucinations
the pharmacological effects of MDA, MDE (designer psychedelics) imitate ___
mescaline and LSD; mix of catecholamine and serotonin interactions
MDA is a metabolite of ___ and is ___ lethal
MDMA; more lethal
schedule for AMT and Foxy
1
AMT onset and duration
3-4h; 12-24h
Foxy onset and duration
1-2h; 3-6h
3 neurotoxic effects of MDMA
- affects brain microvasculature
- affects white matter maturation
- damages axons
MDMA MoA
reduces serotonin transporter binding; can damage presynaptic sereotonin transporter receptors
5 persistent psychiatric effects of MDMA
- impaired verbal and visual memory
- impaired decision making/lack of self control
- panic attacks
- paranoia
- depression
MDMA acts as a presynaptic releasing agent of (3). it acts as a ___
- serotonin
- NE
- DA
competitive reuptake inhibitor
6 negative effects of MDMA
- increased body temp and blood pressure
- jaw clenching
- suppressed appetite
- restlessness
- impaired gait
- insomnia
what drug blocks fatal response to MDMA?
dantrolene
myristicin and elemicin dose
1-2tsp
6 effects of myristicin and elemicin
- confusion/disorientation
- impending doom
- depersonalization/unreality
- euphoria
- visual hallucinations
- acute psychotic reactions
2 unpleasant side effects of myristicin and elemicin
- nausea
2. tremors
4 serotonin-like psychedelics
- LSD
- DMT
- bufotenine
- psilocybin
where do 5HT-like exert effects?
5HT2A
where does LSD activate receptors? (2)
- medial PFC
2. ACC
who initially promoted LSD use?
timothy leary
LSD first synthesized by ___
albert hoffman
oral dose of LSD
25-300 micrograms
how fast is LSD absorbed? peak blood levels?
60 min, 3h
LSD duration of action
6-8 hours
largest amounts of LSD are found in ___
liver
LSD is metabolized to __ before excretion
2-oxo-3-hydroxy-LSD
5 physiological effects of LSD
- slight increase in temp
- pupil dilation
- slightly increased HR and BP
- dizziness/nausea
- drowsiness
lethal dose of LSD
14,000 micrograms
8 psychological effects of LSD
- pupil dilation
- perceptual alterations
- alt in thinking, emotion, self image
- slowed time
- decreased vigilance and logical thought
- loss of boundaries/fear of fragmentation
- mood can shift from depression to gaiety
- tension and anxiety
how fast does tolerance to LSD go away?
several days
lab animals do or do not self administer LSD?
don’t
5 adverse reactions to LSD
- chronic psychotic states
- major affective disorder
- exacerbation of preexisting mental illness
- disruption of personality or chronic brain syndrome
- post hallucinogenic perceptual disorder
what part of brain is altered in LSD? what are the effects?
neocortex, which modulates awareness of surroundings and only lets in essential info; LSD opens the filter
what is hallucinogenic persisting perception disorder?
long term recurrence of symptoms that appeared during LSD intoxication
DMT is structurally related to ___, and binds at ___
serotonin; 5HT2A
ayahuasca is combo of ___
harmine and DMT
4 negative psych effects of DMT
- thought disorder
- paranoia
- anxiety
- disorientation
3 attractive psychological effects of DMT
- visual hallucinations
- loss of control
- euphoria alt w anxiety
how long does DMT last?
30 min
bufotenine comes from ___
toad
bufotenine mech of action
potent agonist at 5HT2A
psilocybin is turned into ___
psilocin, it’s a pro drug
psilocybin exerts potent action at __ and ___ receptors
5HT2A and 5HT1A
3 effects of psilocybin
- changes in mood/thinking
- illusions/visual hallucinations
- impaired ego functioning
psilocybin effects peak, duration
2h, 6-10h
psilocybin intoxication is comparable to a ___
schizophrenia-like psychosis
what is legal x
mix of BZP and TFMPP (benzylpiperazine, 3-trifluoromethylphenylpiperazine)
TFMPP is a ___ agonist
serotonergic
3 NMDA receptor antagonists
PCP
ketamine
DXM
5 PCP effects
- altered perception
- disorganized thought
- cog dysfunction
- suspiciousness/paranoia
- confusion
how is PCP consumed? (4)
powders, tablets, leaf mixtures, crystals
3 ketamine effects
- amnesia
- analgesia
- maintains blood pressure and respiration
toxic effect of ketamine
causes persistent schizophrenic symptomatology
PCP and ket mechanisms of action (2)
noncompetitive antagonists of NMDA/glut receptors
(1) block open channel by occupying site w/in receptor
(2) and reduce frequency of opening NMDA channel by binding to a 2nd attachment site outside
2 ways ket and PCP exert analgesic action
- blocking NMDA receptors in spinal cord
2. activating descending analgesic pathways involving NE and DA
smoked PCP leads to peak effects in ___
15 min
oral absorption of PCP leads to peak blood levels in ___
2 hours
4 NMDA receptor antag low dose effects
- agitation
- euphoria
- disinhibition
- excitement
4 high dose effects of NMDA antag
- coma
- stupor
- seizures
- resp depression
side fx/toxicity of NMDA antag (4)
- severe anxiety
- panic
- paranoia
- rage
4 treatments for PCP and ket OD
- minimize sensory input
- charcoal (binds to PCP in stomach and prevents absorp)
- physical restraint
- sedation with benzos or AAP
MoA of DXM
blockade of NMDA receptors
7 side effects of DXM
- tachycardia
- hypertension
- sleepiness
- slurred speech
- disorientation
- tremors
- psychosis
how long does salvia last?
several min to 1 hour
the effect of salvia is comparable to ___
psilocybin mushrooms
effective dose of salvia
200-500 micrograms
salvia binds only to ___
k opioid receptor
bath salts act like ___ on DAT
cocaine
4 effects of flakka
- murderous rage
- paranoia
- ultraviolence
- running around screaming