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Psych 436 - Final
Hallucinogens: LSD, Mescaline, etc. (Ch14 L19)
29
Psychology
Undergraduate 4
12/03/2008

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Term
The major ingredients of shrooms are ___ and the related compound ____
Definition
The major ingredients of shrooms are psilocybin and the related compound psilocin
Term
Unlike mescaline, psilocybin, and DMT, LSD is a synthetic compound based on...
Definition
ergot alkaloids (a family of fungal alkaloids)
Term
The physiological responses caused by LSD reflect activation of...
Definition
the sympathetic nervous system
Term
The structure of LSD, DMT, psilocin, psilocybin, and 5-MeO-DMT are resemble...
Definition
the structure of 5-HT
Term
Mescaline has a structure similar to that of...this stru
Definition
NE as well as amphetamine - phenethylamine
Term
A class of drugs that includes mescaline, NE, and amphetamine related substances
Definition
Phenethylamine
Term
True/False: LSD binds with relatively high affinity to at least 8 different serotonergic receptor subtypes.
Definition
TRUE
Term
Do hallucinogenic drugs produce tolerance?
Definition
With the exception of DMT, most hallucinogenic drugs produce rapid tolerance with repeated use. (possibly down regulation of 5-HT2A receptors)
Term
What brain structure is thought to play an important role in hallucinogenic drug effects and why?
Definition
The locus coeruleus (dense cluster of NE-containing neurons in the pons that is responsible for most of the noradrenergic projections to the forebrain) b/c LSD, DOM, and mescaline all decrease spontaneous firing of LC neurons but enhances the excitation of the neurons (LC more sensitive to sensory input)
Term
MDMA was synthesized by Merck while they were trying to synthesize...
Definition
anti-bleeding compounds
Term
What schedule is MDMA?
Definition
Made an "emergency" schedule I drug in 1985
Term
MDMA has the same mechanisms as amphetamine/methamphetamine, except
Definition
MDMA preferentially acts at serotonin terminals/SERT...also lesser dopaminergic effects
Term
MDMA stimulates what receptors? what does this cause?
Definition
MDMA stimulates 5-HT1A receptors which leads to increased oxytocin release
Term
What is fatal hyponatremia?
Definition
Death from drinking too much water...some MDMA users become too worried of dehydration so they drink so much water that their Na+ levels get too low)
Term
In lab animals, medium to high doses of MDMA destroy ___ axons (of this variety)
Definition
In lab animals, medium to high doses of MDMA destroy fine 5-HT axons (D-fibers from the dorsal raphe)
Term
Difference b/w hallucinogen, psychotomimetic, psychedelic, and entheogen.
Definition
Hallucinogen= evokes hallucinations.
Psychotomimetic= produces psychosis.
Psychedelic= mind opening;liberation of perception.
Entheogen= spiritually inspiring; creating the divine within.
Term
How much mescaline in dried peyote buttons?
Definition
~3%
Term
How long does mescaline last? What schedule is it?
Definition
Last 10-12 hours. Peyote/mescaline both are schedule I
Term
Name 6 phenethylamines
Definition
NE, mescaline, myristicin (nutmeg), amphetamine, TMA, DOM
Term
Name 4 indoleamine hallucinogens
Definition
DMT, LSD, psilocin/psilocybin, 5-methoxy-DMT (toads)...can count 5-HT
Term
What schedule is LSD and since when?
Definition
LSD is schedule I since 1967
Term
True/False: Cross-substitution and cross-tolerance is not observed between indoleamine and phenethylamine hallucinogens
Definition
FALSE! Cross-substitution and cross- tolerance between indoleamine and phenethylamine hallucinogens have been observed.
Term
When rats are trained to choose between 2 levers, one lever if injected with saline, one lever if injected with LSD, what are the effects after pretreated with 5-HT2A antagonists?
Definition
Hallucinogen-appropriate lever choosing is reduced (effects go away)
Term
5-HT2A receptors are found predominantly in...
Definition
the cortex (remember: postsynaptic, Gq-coupled, espcially on pyramidal neurons)
Term
True/False: Both indoleamine and phenethylamine hallucinogens appear to act as 5-HT2A agonists, BUT not all 5-HT2A agonists are hallucinogenic.
Definition
TRUE...this is a puzzle for psychopharmacologists.
Term
All 5-HT2A agonists regulate...
Definition
All 5-HT2A agonists regulate PLC via Gq
Term
Hallucinogenic drugs, like all 5-HT2A agonists, regulate PLC via Gq, as well as...How is this possible?
Definition
as well as engage a Gi/o-coupled pathway..this is possible by mGluR2 (target receptor for anti-psychotic meds) which Gi/o coupled, binds with 5-HT2A receptors
Term
How is salvia unlike other hallucinogens?
Definition
Salvia is NOT active at 5-HT2A receptors
Term
Salvia is a selective ____ agonist
Definition
KOP-R...possible interaction with CB1 receptors too
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