This presentation aims to discuss the reason why Recreational drugs (also known as legal highs) were created and the problems and consequences behind these drugs.
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Novel Recreational Drugs: Legal Highs and Their Effects
1. Recreational drugs
ass. prof. S. Zakharov, M.D., Ph.D.
Charles University in Prague
First Faculty of Medicine
Department of Occupational Medicine
1
2. „Fourth drive“
(Ronald K. Siegel)
Satisfaction of
hunger, thirst
Need for safety
(shelter)
Sexual drive
? „Altered-mind“ states ?
„We are perceiving creatures...“
(C. Castaneda)
- Thirst for new impressions, sensations,
feeling, emotions, experiences – ways
of satisfaction? 2
4. Novel Recreational Drugs of Abuse („Legal Highs“)
• New synthesized chemicals,not listed in Convention
on psychotropic substances, sold by internet
(in Czech republic – 3 websites with „legal highs“)
• http://botanic.cz – psychoactive plants.
• „clubbers drugs“ – use 40% of night clubs visiters
• Each 2-3 months new „Legal High“ is marketed
(absence of studies about toxicity, biometabolism, no
lab methods of identification in human liquids)
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5. Novel Recreational Drugs of Abuse
• Production in Southeast Asia, China,
packaging and distribution in Europe
and USA.
• Growth of popularity: earlier http://bythemg.com,
now http://bythekg.com
• Simple synthesis schemes (2-3 chemical
reactions, common reagents (toluene, acetone...),
high grade of chemical purity, low prices
• Chemical structure is similar to the structure of
forbidden „classical“ psychoactive substances
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6. Molecules driving the human world
• 1. Catecholamine neurotransmitter
dopamine
• Brain reward system:
enjoyment, motivation, sociability
• Production: substancia nigra, ventral tegmental area
• D1-D5 receptors in CNS
• Cannot cross the blood-brain barrier
• 2. Monoamine neurotransmitter
serotonin
• Contributes to happiness,
well-being, dominant behavior
• Production: raphe nuclei (brainstem)
• 5-HT1 – 5-HT7 receptors in CNS 6
9. 3. Common psychoactives
• Opiates and opioids
- morphine, heroin
- hydrocodone, oxycodone
• Cannabis and cannabinoids
• Cocaine and analogues
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10. Amphetamines, methamphetamines
• Synthesized in 1887 – Amph.
(L.Edeleanu, Germany), 1893
– Meth. (N. Nagayoshi, Japan)
• 1933 – Benzedrine (A.), 1938 –
Pervitin (M.)
• World War II – for soldiers
• 1971 – Schedule II drug (USA)
• Recreational use „speed“,„meth“
• In nature – Acacia species
(A. berlandieri, A. rigidula)
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11. Amphetamines, methamphetamines
• Recreational use: from 1937 (Minnesota, USA,
students), 16-51 mln. of abusers worldwide
• Psychological effects: euphoria, positive mood,
decreased fatigue, reduced appetite, increased
energy (self-esteem, self-confidence),
alertness, sociability, psychomotor agitation,
insomnia, increased libido, excessive feeling of
power and invincibility, hallucinations
• Routes of exposure: ingestion, injection,
insufflation, inhalation (smoking), suppositoria
(rectal, vaginal) 11
12. Amphetamines, methamphetamines
• Mechanisms of action
(toxicity):
i – enters the cell by
passive diffusion or
ii – via membrane-bound
dopamine reuptake
transportes (DAT)
iii – redistribution of DA
from vesicles into the
cytosol (VMAT-2)
iv – promotes the activity of
tyrosine hydroxylase
v – blocking the presynaptic re-uptake of DA by DAT
vi – inhibiting MAO activity
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16. MDA, MDMA („Extasy“), MDxx
• MDA synthetised in 1910
(G.Mannish, W.Jacobson),
MDMA in 1912 (A.Kollisch)
• Recreational use from 1963
• „Love drugs“, empathogens-
entactogens (induce
feelings of empathy, love,
emotional closeness to others)
• Dose: 100-160 mg MDA, 75-120 mg MDMA
• Overdose at 200-250mg (mainly in combination with
excessive physical activity + strong alcohol)
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17. MDA, MDMA („Extasy“), MDxx
• Mechanisms of action:
releasing agents for mainly
serotonin (SSRA), than
dopamine, norepinephrine
- enter neuron via carriage by
the monoamine transporters
(DAT, SERT); inhibit VMAT... (like Meth).
- indirect stimulation of oxytocin secretion (orgasm,
hugging)
- Mechanisms of toxicity: amphetamin-like +
serotonin syndrome!
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18. Acute recreational drug toxicity syndrom
• Sympathomimetic toxidrome
• Serotonin syndrome
• Psychiatric symptoms
(„Amphetamine psychosis“)
• Combination: „alcohol + legal high“
milder cardiovascular symptoms
(softer „onset“ of MDMA after
1 glass of red vine), --
-- better driving ability then after
alcohol intake only)
• Use less than 1 weekly
(tolerance due to „receptor
downregulation effect“)
• Drink plenty of water (not Coca)
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19. Selective serotonin releasing agents (SSRA)
• MDMA („Extasy“), MDxx, PMA („Chicken
Powder“, „Dr. Death“) – effective releasers
of 5-HT, reuptake inhibitors of 5-HT (risk in
combination with SSRI, MAO-A and CYP450
inhibitors)
• Serotonergic neurotoxicity - Serotonin
syndrom:
- Rapid increase in body temperature
(hyperthermia)
- Hypertension/hypotension, tachycardia,
convulsions, seizures, coma
- Dehydratation, rhabdomyolysis 19
20. Selective serotonin releasing agents (SSRA)
• Treatment: intubation, external cooling (4º
water, ice)
- Internal cooling (i.v. Infusion of cooled
saline, gastric lavage with „ice“ saline),
- Treatment of convulsions and agitation:
benzodiazepines (i.v. diazepam in bolus),
phenytoin, thiopental;
- Treatment of hypertension: alpha/beta
blockers, nitroprusside;
- Dantrolene (5-HT antagonist);
- Rehydratation 20
21. Cathinones
• Khat (Catha edulis) – tropical
East Africa, Arabian Peninsula;
• Fresh leaves – stimulating
amphetamine-like effect;
• Legal in UK,Netherlands,Israel
• http://ekhat.org/our-new-
shop-buy-khat-online-now
prices of khat in our site:
• 100gr – £33.99
• 200gr – £38.99
• 400gr – £53.99 21
22. Cathinones
• Chemically similar to Amph.
• Substituted C.: „designer
drugs“ - Mephedrone,
Methylone, Naphyrone
• Replacement of MDMA
(„party drugs“) – stimulants,
entactogens (higher doses –
worse cross the BBB-100-250mg)
• Were „legal highs“
until 2010
• „Plant fertilisers“,
„Bath salte“,
„Miaow Miaow“ (Cat) 22
23. Piperidines
• Pipradol, Methylphenidate, 2-DPMP
(Legal!) (Desoxypipradol)
• No polar functional groups (targets
for metabol. enzymes),highly lipophilic
• „Ivory wave“, „Purple Wave“, „Vanilla Sky“ – „bath
salts“ – amphetamine-like „journey“
Soothing bath Salts – Relax and soak away IVORY WAVE, Concentrated
bath salts, please only use as advised, PLEASE do not use this as
SNUFF!!!
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24. New Herbal Stimulants
• Kratom (Mitragyna speciosa)
- Native to Southeast Asia
- Leaves contain alcaloid mitragynin
interacts with opioid receptors
- Stimulant-like effect in small doses,
opiate-like effect in higher doses
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25. Psychedelics: Phenethylamines (mescaline,
DOx, 2C-x)
• Mescaline – alkaloid in peyote
cactus (Lophophora williamsii)
• Activating of „hallucinogenous“
serotonin 5-HT2a receptor
(5-HT2a – agonist)
• Excitation of neurons in the
prefrontal cortex - hallucinogen
• In add. stimulates DA-receptors
• Native Americans in Mexico use
for over 3000 years (religious
ceremonies)
• Dried cactus legal in UK 25
26. Psychedelics: Tryptamines (LSD - 5-HT2a–
agonist, DA–receptor agonist )
• LSD (Lysergic acid diethylamide)
• Synthesized by A.Hofmann in 1938
(Sandoz Laboratories)
• Recreational drug, entheogen,
psychedelic therapy (non-addictive)
• 1950s – CIA („mind control“, chemical warfare)
• „Trip“ – eidetic imagery, altered sense of time, true
hallucinations, „ego death“ (6-14 hours)
• „Bad trip“ – the best treatment is an
anxiolytic agent (diazepam)
• „Flashbacks“
• Dosage: 100-500 ug (mkg) – „blotters“
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27. LSD (5-HT2a – receptor agonist)
• Natural sources:
• Fungus Claviceps purpurea (grows
on the rye and other cereals) -
ergotamine
• „Morning glory“ (Ipomoea tricolor, I. violacea) –
ergine (LSA, lysergic acid amide)
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28. Novel Recreational Herbal Drugs of Abuse
• Hawaiian Baby Woodrose
(Argyreia nervosa)
- Effect of ergine (LSA) – LSD-like
- „Tropical stones“ (seeds
of HBW)
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31. Psychedelics: Tryptamines:
Psilocin (Psilocybin)
• History: religious ceremonies (9000 BCE – Africa,
6000 BCE – Europe, Spain, Mayan and Aztec
cultures in America)
• Purified from P. mexicana in 1958 by A. Hofmann
• Low toxicity (LD50 for rats 280 mg/kg – 1,7 kg
of dried or 17 kg of fresh rooms for adult)
• Recreational dosage: 10-50 mg
(alkohol and tobacco enhance
the effect)- „brain movies“
• Adverse reactions in 25% of
cases (psychosis, panic attack,
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aggression, confusion)
32. Psychedelics: Tryptamines:
DMT (Dimethyltryptamine)
• Natural sources: 50 plant species,
4 animal species
• Product of normal metabolism in
humans and other mammals?
• Ayahuasca (Amazonian Amerindian
brew) – DMT (B. rusbyana,
Psychotria viridis aj.)+ MAOI
(harmala alcaloids of jungle
vine Banisteriopsis caapi)
• Agonist of 5-HT2a receptor
(„classical hallucinogen“)
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33. Psychedelics: Tryptamines:
DMT (Dimethyltryptamine)
• Routes of exposure: ingestion (only with MAOI –
othervise is metabolised in GIT), inhalation
(smoking as „crack“ cocain), insufflation, injection
(contacts with „alien entities“);
• Short action when smoking („businessman´s trip“)
15 min, orally over 3 hours.
• Intense erotic
imagery and
sensations,
archetypal visions
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34. Deliriants:
Muscimol (Amanita muscaria)
• Psychoactive alcaloid in
Amanita muscaria, A.pantherina
• Siberian shamans, Scandinavia.
Possibly the Soma drink of
India (Rig-Veda)
• Selective agonist of the GABAA
receptor (major inhibitory
neurotransmitter in CNS) – like
BD, barbiturates
• Excreted unchanged by kidneys
• Dosage: 10-15 mg (1 g of dried rooms)
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36. Deliriants: Myristicin
• Myristica fragrans („Nutmeg
tree“)
• Anticholinergic-like symptoms
when consuming raw nutmegs
(nausea, vomiting, dizziness, anxiety, headache,
hallucinations and irrational behavior, myosis)
• MDMA-like chemical structure + weak inhibitor
MAO
• extremely long time before peak (4-7 hours),
effects last for 24-72 hours
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37. Dissociatives: Ketamine („Vitamin K“,
„Kitties“), Phencyclidine („Angel dust“)
• Dissociation – reduce/block signals to the
conscious mind from other parts of the brain
(trances):
- sensory loss (dissociation from the body),
- depersonalization („out-of-body“, „near-death“
experiences), spiritual/psychonautic use
- derealization (unreal world outside)
Other effects: hallucinogenic, euphoric, anesthetic
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38. Dissociatives: Ketamine, Phencyclidine
• „Non-classical hallucinogens“ – no effect on 5-
HT2A receptors in CNS
• Mechanisms of action: non-competitive NMDA-
receptor antagonist (antagonizes glutamic acid –
main excitatory neurotransmitter in CNS), D2-
receptor partial agonist
• Problems of abuse: great neurotoxicity (much
more than of „classical hallucinogens“) –
cognitive impairment, memory loss, urinary tract
diseases (ulcerative cystitis, „shrunken bludder“),
abdominal „K-cramps“
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39. Cannabis and cannabinoids
• Species: Cannabis sativa (North America),
C. indica (!!!) (Indie), C. ruderalis (Russia)
• Marijuana (flowers and subtending leaves
and stalks of mature female plants)
• Hashish (compressed stalked resin
glands from the unfertilized buds)
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40. Natural cannabinoids (over 85)
• THC (Tetrahydrocannabinol)
• Binds to the cannabinoid
receptor CB1 in CNS (agonist)
• Activate endogenous opioid pathways (μ1 OR) –
precipitate dopamine release in nucl. accumbens
• Analogous to the endogenous cannabinoids (2-AG
– in human maternal milk!, anandamide, NADA,
OAE...)
• Effects: euphoria, relaxation, analgesia, alteration
of senses, appetite stimulation („munchies“)
• Bioavailability 10-35% (inhalation), 6-20% (oral),
metabolism mostly hepatic, excretion 65-80%
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feces, 20-35% urine (acid metabolites)
41. Synthetic cannabinoids – CB1-agonists
• Distinct chemical classes (THC-analogues,
aminoalkylindoles, diarylpyrazoles, quinolines...)
• Distinct legal status – many legal ones („legal
highs“) – www.bythekg.com : JWH-250, AM-2201,
AM-694, JWH-019, 2-DPMP. ATTENTION!
JWH-203 SALE OUT!! 5$ PER GRAM!!
• JWH cannabinoids – synthesized by the John.W.
Huffman research group at Clemson University
(over 450 chemicals)
• AM cannabinoids – synthesized by the A.
Makriyannis research group at the University of
Connecticut
• HU cannabinoids – Hebrew University, Jerusalem
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42. „Legal smoke blends“ with CB1-agonists
• „Herbal“ mixtures – synthetic Cannabinoid
Receptor Agonists JWH class – „Spice“, „Smoke“,
„Jamaican Gold“, „Ninja“, „Monkees go bananas“
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