LSD

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Lysergic acid diethylamide
)
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For other uses, see LSD (disambiguation).

Lysergic acid diethylamide (LSD)
INN: Lysergide
Skeletal formula of LSD
Ball-and-stick model of LSD
Clinical data
Pronunciation/daɪ eθəl ˈæmaɪd/, /æmɪd/, or /eɪmaɪd/[1][2][3]
Trade namesDelysid
Other namesLSD, LSD-25, LAD, Acid, others
AHFS/Drugs.comReference
Pregnancy
category
  • C
psychedelic)
ATC code
  • None
Legal status
Legal status
Kidneys[6][9]
Identifiers
  • (6aR,9R)-N,N-diethyl-7-methyl-4,6,6a,7,8,9-hexahydroindolo[4,3-fg]quinoline-9-carboxamide
JSmol)
Melting point80 to 85 °C (176 to 185 °F)
Solubility in water67.02[11] mg/mL (20 °C)
  • CCN(CC)C(=O)[C@H]1CN([C@@H]2Cc3c[nH]c4c3c(ccc4)C2=C1)C
  • InChI=1S/C20H25N3O/c1-4-23(5-2)20(24)14-9-16-15-7-6-8-17-19(15)13(11-21-17)10-18(16)22(3)12-14/h6-9,11,14,18,21H,4-5,10,12H2,1-3H3/t14-,18-/m1/s1 checkY
  • Key:VAYOSLLFUXYJDT-RDTXWAMCSA-N checkY
  (verify)

Lysergic acid diethylamide, commonly known as LSD (from German Lysergsäure-diethylamid), and known colloquially as acid or lucy, is a potent psychedelic drug.[12] Effects typically include intensified thoughts, emotions, and sensory perception.[13] At sufficiently high dosages, LSD manifests primarily mental, visual, and auditory hallucinations.[14][15] Dilated pupils, increased blood pressure, and increased body temperature are typical.[16]

Effects typically begin within half an hour and can last for up to 20 hours (although on average, experiences last 8–12 hours).

ultraviolet light.[16]

LSD is pharmacologically considered to be non-addictive with a low potential for abuse. Adverse psychological reactions are possible, such as

visual snow and palinopsia.[20][21]

LSD is structurally related to

psychedelic mushrooms. Thus, LSD shares some mechanisms of action and psychedelic effects with psilocybin and other tryptamines.[22][23][24]

The effects of LSD are thought to stem primarily from it being an

serotonin receptor. While exactly how LSD exerts its effects by agonism at this receptor is not fully understood, corresponding increased glutamatergic neurotransmission and reduced default mode network activity are thought to be key mechanisms of action.[7][12][25][26][27] LSD also binds to dopamine D1 and D2 receptors, which is thought to contribute to reports of LSD being more stimulating than compounds such as psilocybin.[28][29]

Swiss chemist Albert Hofmann first synthesized LSD in 1938 from lysergic acid, a chemical derived from the hydrolysis of ergotamine, an alkaloid found in ergot, a fungus that infects grain.[16][20] LSD was the 25th of various lysergamides Hofmann synthesized from lysergic acid while trying to develop a new analeptic, hence the alternate name LSD-25. Hofmann discovered its effects in humans in 1943, after unintentionally ingesting an unknown amount, possibly absorbing it through his skin.[30][31][32] LSD was subject to exceptional interest within the field of psychiatry in the 1950s and early 1960s, with Sandoz distributing LSD to researchers under the trademark name Delysid in an attempt to find a marketable use for it.[31]

LSD-assisted

Project MKUltra, which used psychoactive substances to aid interrogation. The CIA administered LSD to unwitting test subjects in order to observe how they would react, the most well-known example of this being Operation Midnight Climax.[31] LSD was one of several psychoactive substances evaluated by the U.S. Army Chemical Corps as possible non-lethal incapacitants in the Edgewood Arsenal human experiments.[31]

In the 1960s, LSD and other psychedelics were adopted by, and became synonymous with, the

Schedule 1 controlled substance by the United Nations in 1971 and currently has no approved medical uses.[16] As of 2017, about 10% of people in the United States have used LSD at some point in their lives, while 0.7% have used it in the last year.[37] It was most popular in the 1960s to 1980s.[16] The use of LSD among US adults increased 56.4% from 2015 to 2018.[38]

Uses

Recreational

LSD is commonly used as a recreational drug.[39]

Spiritual

LSD can catalyze intense spiritual experiences and is thus considered an

sacred scriptures of the great religions of the world and the texts of ancient civilizations.[42]

Medical

See also:
Lysergic acid diethylamide § Research

LSD currently has no approved uses in

medicine.[43][44] A meta analysis concluded that a single dose was shown to be effective at reducing alcohol consumption in people suffering from alcoholism.[35] LSD has also been studied in depression, anxiety,[45][46] and drug dependence, with positive preliminary results.[47][48]

Effects

LSD is exceptionally potent, with as little as 20 μg capable of producing a noticeable effect.[16]

Physical

Some symptoms reported for LSD[49][50]
Patient with Mydriasis due to usage of LSD
Patient with mydriasis (pupil dilation) due to usage of LSD

LSD can induce physical effects such as

blood sugar, and heart rate, as well as goose bumps, jaw clenching, dry mouth, and hyperreflexia. In cases of adverse reactions, users may experience numbness, weakness, nausea, and tremors.[16]

Psychological

The primary immediate psychological effects of LSD are

visual hallucinations and illusions, often referred to as "trips". These effects typically begin within 20–30 minutes of oral ingestion, peak three to four hours after ingestion, and can last up to 20 hours, particularly with higher doses. An "afterglow" effect, characterized by an improved mood or perceived mental state, may persist for days or weeks following ingestion.[51] Positive experiences, or "good trips", are described as intensely pleasurable and can include feelings of joy, euphoria, an increased appreciation for life, decreased anxiety, a sense of spiritual enlightenment, and a feeling of interconnectedness with the universe.[52][53]

Conversely, negative experiences, known as "bad trips," can induce feelings of fear, anxiety, panic, paranoia, and even suicidal ideation.[54] While the occurrence of a bad trip is unpredictable, factors such as mood, surroundings, sleep, hydration, and social setting, collectively referred to as "set and setting", can influence the risk and are considered important in minimizing the likelihood of a negative experience.[55][56]

Sensory

LSD induces an animated sensory experience affecting senses, emotions, memories, time, and awareness, lasting from 6 to 20 hours, with the duration dependent on dosage and individual tolerance. Effects typically commence within 30 to 90 minutes post-ingestion, ranging from subtle perceptual changes to profound cognitive shifts. Alterations in auditory and visual perception are common.[57][58]

Users may experience enhanced visual phenomena, such as vibrant colors, objects appearing to morph, ripple or move, and geometric patterns on various surfaces. Changes in the perception of food's texture and taste are also noted, sometimes leading to aversion towards certain foods.[57][59]

There are reports of inanimate objects appearing animated, with static objects seeming to move in additional spatial dimensions.

echo-like distortions and an intensified experience of music. Higher doses can lead to more intense sensory perception alterations, including synesthesia, perception of additional dimensions, and temporary dissociation
.

Adverse effects

Addiction experts in psychiatry, chemistry, pharmacology, forensic science, epidemiology, and the police and legal services engaged in delphic analysis regarding 20 popular recreational drugs. LSD was ranked 14th in dependence, 15th in physical harm, and 13th in social harm.[62]

LSD, a classical psychedelic, is deemed physiologically safe at standard dosages (50–200 μg) and its primary risks lie in psychological effects rather than physiological harm.[25][63] A 2010 study by David Nutt ranked LSD as significantly less harmful than alcohol, placing it near the bottom of a list assessing the harm of 20 drugs.[64]

Psychological effects

Mental disorders

LSD can induce

panic attacks or extreme anxiety, colloquially termed a "bad trip". Despite lower rates of depression and substance abuse found in psychedelic drug users compared to controls, LSD presents heightened risks for individuals with severe mental illnesses like schizophrenia.[65][66] These hallucinogens can catalyze psychiatric disorders in predisposed individuals, although they do not tend to induce illness in emotionally healthy people.[25] Several behavioral-related fatalities and suicides have been associated with LSD.[67]

Suggestibility

While research from the 1960s indicated increased suggestibility under the influence of LSD among both mentally ill and healthy individuals, recent documents suggest that the CIA and Department of Defense have discontinued research into LSD as a means of mind control.[68][69][70][non-primary source needed]

Flashbacks

Flashbacks are psychological episodes where individuals re-experience some of LSD's subjective effects after the drug has worn off, persisting for days or months post-hallucinogen use.[71][72] These experiences are associated with hallucinogen persisting perception disorder, where flashbacks occur intermittently or chronically, causing distress or functional impairment.[21]

The etiology of flashbacks is varied. Some cases are attributed to somatic symptom disorder, where individuals fixate on normal somatic experiences previously unnoticed prior to drug consumption.[73] Other instances are linked to associative reactions to contextual cues, similar to responses observed in individuals with past trauma or emotional experiences.[74] The risk factors for flashbacks remain unclear, but pre-existing psychopathologies may be significant contributors.[75]

Estimating the prevalence of

SSRIs can potentiate LSD-induced flashbacks, even months after stopping LSD use.[76]
: 145 

Drug-interactions

Several psychedelics, including LSD, are metabolized by

dissociative effects, particularly in individuals with bipolar disorder.[76]: 146 [77][78] Lithium notably intensifies LSD reactions, potentially leading to acute comatose states when combined.[7]

Fatal dose

Lethal oral dose of LSD in humans is estimated at 100 mg, based on LD50 and lethal blood concentrations observed in rodent studies.[63]

Tolerance

LSD shows significant

DMT.[a] Tolerance to LSD also builds up with consistent use,[86] and is believed to result from serotonin 5-HT2A receptor downregulation.[80] Researchers believe that tolerance returns to baseline after two weeks of not using psychedelics.[87]

Addiction and dependence liability

The

stimulants and depressants.[90][91]

Cancer and pregnancy

The

teratogenic or mutagenic effects.[7]

Overdose

There have been no documented fatal human overdoses from LSD,[7][93] although there has been no "comprehensive review since the 1950s" and "almost no legal clinical research since the 1970s".[7] Eight individuals who had accidentally consumed an exceedingly high amount of LSD, mistaking it for cocaine, had plasma levels of 1000–7000 μg per 100 mL blood plasma had suffered from comatose states, vomiting, respiratory problems, hyperthermia, and light gastrointestinal bleeding; however, all of them survived without residual effects upon hospital intervention.[7]

Individuals experiencing a bad trip after LSD intoxication may be presented with severe anxiety, tachycardia, often accompanied by phases of psychotic agitation and varying degrees of delusions.[63] Cases of death on a bad trip have been reported due to prone maximal restraint (PMR) and positional asphyxia when the individuals were held restraint by law enforcement personnel.[63]

Massive doses are largely managed by

sympatholytics may be useful for treating ergotism.[94]

Designer drug overdose

Many

numbness of the tongue and mouth followed by a metallic chemical taste was observed, and researchers describe this physical side effect as one of the main discriminants between NBOMe compounds and LSD.[103][104][105] Despite high potency, recreational doses of LSD have only produced low incidents of acute toxicity, but NBOMe compounds have extremely different safety profiles.[93][99] Ehrlich's reagent can be used to test for the presence of LSD.[106]

Pharmacology

Pharmacodynamics

Binding affinities of LSD for various receptors. The lower the dissociation constant (Ki), the more strongly LSD binds to that receptor (i.e. with higher affinity). The horizontal line represents an approximate value for human plasma concentrations of LSD, and hence, receptor affinities that are above the line are unlikely to be involved in LSD's effect. Data averaged from data from the Ki Database
Binding affinity for various serotonin receptors
Receptor Ki (nM)
5-HT1A 1.1
5-HT2A 2.9
5-HT2B 4.9
5-HT2C 23
5-HT5A 9
5-HT6 2.3

Most

serotonergic psychedelics are not significantly dopaminergic, and LSD is therefore atypical in this regard. The agonism of the D2 receptor by LSD may contribute to its psychoactive effects in humans.[29]

LSD binds to most serotonin receptor subtypes except for the 5-HT3 and 5-HT4 receptors. However, most of these receptors are affected at too low affinity to be sufficiently activated by the brain concentration of approximately 10–20 nM.[25] In humans, recreational doses of LSD can affect 5-HT1A (Ki = 1.1 nM), 5-HT2A (Ki = 2.9 nM), 5-HT2B (Ki = 4.9 nM), 5-HT2C (Ki = 23 nM), 5-HT5A (Ki = 9 nM [in cloned rat tissues]), and 5-HT6 receptors (Ki = 2.3 nM).[107] Although not present in humans, 5-HT5B receptors found in rodents also have a high affinity for LSD.[108] The psychedelic effects of LSD are attributed to cross-activation of 5-HT2A receptor heteromers.[109] Many but not all 5-HT2A agonists are psychedelics and 5-HT2A antagonists block the psychedelic activity of LSD. LSD exhibits functional selectivity at the 5-HT2A and 5-HT2C receptors in that it activates the signal transduction enzyme phospholipase A2 instead of activating the enzyme phospholipase C as the endogenous ligand serotonin does.[110]

Exactly how LSD produces its effects is unknown, but it is thought that it works by increasing

H1 receptors, displaying antihistamine effects.[113][114]

LSD is a

lysergic acid amide (LSA) that lacks the diethylamide moiety is far less hallucinogenic in comparison.[116]

Pharmacokinetics

Resting state fMRI BOLD-contrast imaging shows increased primary visual cortex (V1) cerebral blood flow (CBF) and increased V1 resting state functional connectivity (RSFC), which correlated more strongly with the visual hallucinatory aspect of the LSD experience. Increased V1 RSFC also correlated with visual analogue scale (VAS) ratings of simple hallucinations and the magnitude of CBF observed in visual cortex correlated positively with ratings of complex imagery on the LSD-induced altered state of consciousness (ASC).[27]
Resting state fMRI BOLD-contrast imaging shows decreased bilateral parahippocampal (PH) resting state functional connectivity (RSFC), which correlated with the ego-dissolution aspect of the LSD experience. A significant relationship was also found between decreased posterior cingulate cortex (PCC) alpha power and default mode network (DMN) disintegration with ego-dissolution.[27]

The acute effects of LSD normally last between 6 and 10 hours depending on dosage, tolerance, and age.[117][118] Aghajanian and Bing (1964) found LSD had an elimination half-life of only 175 minutes (about 3 hours).[107] However, using more accurate techniques, Papac and Foltz (1990) reported that 1 µg/kg oral LSD given to a single male volunteer had an apparent plasma half-life of 5.1 hours, with a peak plasma concentration of 5 ng/mL at 3 hours post-dose.[119]

The

terminal half-life of 8.9±5.9 hours.[6][9]

The effects of the dose of LSD given lasted for up to 12 hours and were closely correlated with the concentrations of LSD present in circulation over time, with no acute

intravenous administration of LSD.[6][9] The sample was equally divided between male and female subjects and there were no significant sex differences observed in the pharmacokinetics of LSD.[6][9]

Mechanisms of action

Neuroimaging studies using

fMRI recently suggested that LSD changes the cortical functional architecture.[120] These modifications spatially overlap with the distribution of serotoninergic receptors. In particular, increased connectivity and activity were observed in regions with high expression of 5-HT2A receptor, while a decrease in activity and connectivity was observed in cortical areas that are dense with 5-HT1A receptor.[121] Experimental data suggest that subcortical structures, particularly the thalamus, play a synergistic role with the cerebral cortex in mediating the psychedelic experience. LSD, through its binding to cortical 5-HT2A receptor, may enhance excitatory neurotransmission along frontostriatal projections and, consequently, reduce thalamic filtering of sensory stimuli towards the cortex.[122] This phenomenon appears to selectively involve ventral, intralaminar, and pulvinar nuclei.[122]

Chemistry

The four possible stereoisomers of LSD. Only (+)-LSD is psychoactive.

LSD is a

Retrosynthetically, the C-5 stereocenter could be analysed as having the same configuration of the alpha carbon of the naturally occurring amino acid L-tryptophan
, the precursor to all biosynthetic ergoline compounds.

However, LSD and iso-LSD, the two C-8 isomers, rapidly interconvert in the presence of bases, as the alpha proton is acidic and can be deprotonated and reprotonated. Non-psychoactive iso-LSD which has formed during the synthesis can be separated by chromatography and can be isomerized to LSD.

Pure salts of LSD are

UV light
.

Synthesis

LSD is an

peptide coupling reagents.[114] Lysergic acid is made by alkaline hydrolysis of lysergamides like ergotamine, a substance usually derived from the ergot fungus on agar plate; or, theoretically possible, but impractical and uncommon, from ergine (lysergic acid amide, LSA) extracted from morning glory seeds.[125] Lysergic acid can also be produced synthetically, although these processes are not used in clandestine manufacture due to their low yields and high complexity.[126][127]

Research

The precursor for LSD,

GMO baker's yeast.[128]

Dosage

White on White blotters (WoW) for sublingual administration

A single dose of LSD may be between 40 and 500 micrograms—an amount roughly equal to one-tenth the mass of a grain of sand. Threshold effects can be felt with as little as 25 micrograms of LSD.

micrograms
(µg), or millionths of a gram.

In the mid-1960s, the most important black market LSD manufacturer (Owsley Stanley) distributed LSD at a standard concentration of 270 µg,[132] while street samples of the 1970s contained 30 to 300 µg. By the 1980s, the amount had reduced to between 100 and 125 µg, dropping more in the 1990s to the 20–80 µg range,[133] and even more in the 2000s (decade).[132][134]

Reactivity and degradation

"LSD," writes the chemist Alexander Shulgin, "is an unusually fragile molecule ... As a salt, in water, cold, and free from air and light exposure, it is stable indefinitely."[117]

LSD has two

carboxamide attachment, but removal of the chiral proton at the C5 position (which was once also an alpha proton of the parent molecule tryptophan) is assisted by the inductively withdrawing nitrogen and pi electron delocalisation with the indole ring.[citation needed
]

LSD also has

aromatic ring, being conjugated with the indole ring, is susceptible to nucleophilic attacks by water or alcohol, especially in the presence of UV or other kinds of light. LSD often converts to "lumi-LSD," which is inactive in human beings.[117]

A controlled study was undertaken to determine the stability of LSD in pooled urine samples.[135] The concentrations of LSD in urine samples were followed over time at various temperatures, in different types of storage containers, at various exposures to different wavelengths of light, and at varying pH values. These studies demonstrated no significant loss in LSD concentration at 25 °C for up to four weeks. After four weeks of incubation, a 30% loss in LSD concentration at 37 °C and up to a 40% at 45 °C were observed. Urine fortified with LSD and stored in amber glass or nontransparent polyethylene containers showed no change in concentration under any light conditions. Stability of LSD in transparent containers under light was dependent on the distance between the light source and the samples, the wavelength of light, exposure time, and the intensity of light. After prolonged exposure to heat in alkaline pH conditions, 10 to 15% of the parent LSD epimerized to iso-LSD. Under acidic conditions, less than 5% of the LSD was converted to iso-LSD. It was also demonstrated that trace amounts of metal ions in buffer or urine could catalyze the decomposition of LSD and that this process can be avoided by the addition of

EDTA
.

Detection

Ehrlich's reagent can be used to test for the presence of LSD in a sample, turning purple upon reaction.[106]

LSD can be detected in concentrations larger than approximately 10% in a sample using

milligrams).[136]

LSD may be quantified in urine for drug abuse testing programs, in plasma or serum to confirm poisoning in hospitalized victims, or in whole blood for forensic investigations. The parent drug and its major metabolite are unstable in biofluids when exposed to light, heat, or alkaline conditions, necessitating protection from light, low-temperature storage, and quick analysis to minimize losses.[137] Maximum plasma concentrations are typically observed 1.4 to 1.5 hours after oral administration of 100 µg and 200 µg, respectively, with a plasma half-life of approximately 2.6 hours (ranging from 2.2 to 3.4 hours among test subjects).[138]

Due to its potency in microgram quantities, LSD is often not included in standard pre-employment urine or hair analyses.[136][139] However, advanced liquid chromatography–mass spectrometry methods can detect LSD in biological samples even after a single use.[139]

History

... affected by a remarkable restlessness, combined with a slight dizziness. At home I lay down and sank into a not unpleasant intoxicated-like condition, characterized by an extremely stimulated imagination. In a dreamlike state, with eyes closed (I found the daylight to be unpleasantly glaring), I perceived an uninterrupted stream of fantastic pictures, extraordinary shapes with intense, kaleidoscopic play of colors. After some two hours this condition faded away.

—Albert Hofmann, on his first experience with LSD[140]: 15 

Main article: History of LSD

LSD was first synthesized on November 16, 1938[141] by Swiss chemist Albert Hofmann at the Sandoz Laboratories in Basel, Switzerland as part of a large research program searching for medically useful ergot alkaloid derivatives. The abbreviation "LSD" is from the German "Lysergsäurediethylamid".[142]

Albert Hofmann in 2006

LSD's

µg of LSD. He said this would be a threshold dose based on the dosages of other ergot alkaloids. Hofmann found the effects to be much stronger than he anticipated.[144] Sandoz Laboratories introduced LSD as a psychiatric drug in 1947 and marketed LSD as a psychiatric panacea, hailing it "as a cure for everything from schizophrenia to criminal behavior, 'sexual perversions', and alcoholism."[145] Sandoz would send the drug for free to researchers investigating its effects.[30]

'Effects of Lysergic Acid Diethylamide (LSD) on Troops Marching' – 16mm film produced by the United States military circa 1958

Beginning in the 1950s, the US

Rockefeller Commission report
in 1975.

In 1963, the Sandoz patents on LSD expired[133] and the Czech company Spofa began to produce the substance.[30] Sandoz stopped the production and distribution in 1965.[30]

Several figures, including Aldous Huxley, Timothy Leary, and Al Hubbard, had begun to advocate the consumption of LSD. LSD became central to the counterculture of the 1960s.[147] In the early 1960s the use of LSD and other hallucinogens was advocated by new proponents of consciousness expansion such as Leary, Huxley, Alan Watts and Arthur Koestler,[148][149] and according to L. R. Veysey they profoundly influenced the thinking of the new generation of youth.[150]

On October 24, 1968, possession of LSD was made illegal in the United States.[151] The last FDA approved study of LSD in patients ended in 1980, while a study in healthy volunteers was made in the late 1980s. Legally approved and regulated psychiatric use of LSD continued in Switzerland until 1993.[152]

In November 2020, Oregon became the first US state to decriminalize possession of small amounts of LSD after voters approved

Ballot Measure 110.[153]

Society and culture

Counterculture

By the mid-1960s, the youth countercultures in California, particularly in San Francisco, had widely adopted the use of hallucinogenic drugs, including LSD. The first major underground LSD factory was established by Owsley Stanley.[154] Around this time, the Merry Pranksters, associated with novelist Ken Kesey, organized the Acid Tests, events in San Francisco involving LSD consumption, accompanied by light shows and improvised music.[155][156] Their activities, including cross-country trips in a psychedelically decorated bus and interactions with major figures of the beat movement, were later documented in Tom Wolfe's The Electric Kool-Aid Acid Test (1968).[157]

In San Francisco's Haight-Ashbury neighborhood, the Psychedelic Shop was opened in January 1966 by brothers Ron and Jay Thelin to promote safe use of LSD. This shop played a significant role in popularizing LSD in the area and establishing Haight-Ashbury as the epicenter of the hippie counterculture. The Thelins also organized the Love Pageant Rally in Golden Gate Park in October 1966, protesting against California's ban on LSD.[158][159]

A similar movement developed in London, led by British academic

Richard Alpert, Hollingshead played a key role in the famous LSD research at Millbrook before moving to New York City for his own experiments. In 1965, he returned to the UK and founded the World Psychedelic Center in Chelsea, London.[160]

Music and Art

Psychedelic art for the cover of an issue of underground counterculture newspaper, Helix, 1967

The influence of LSD in the realms of music and art became pronounced in the 1960s, especially through the Acid Tests and related events involving bands like the

The Grateful Dead, in particular, became central to the culture of "Deadheads," with their music heavily influenced by LSD.[161]

In the United Kingdom, Michael Hollingshead, reputed for introducing LSD to various artists and musicians like Storm Thorgerson, Donovan, Keith Richards, and members of the Beatles, played a significant role in the drug's proliferation in the British art and music scene. Despite LSD's illegal status from 1966, it was widely used by groups including the Beatles, the Rolling Stones, and the Moody Blues. Their experiences influenced works such as the Beatles' Sgt. Pepper's Lonely Hearts Club Band and Cream's Disraeli Gears, featuring psychedelic-themed music and artwork.[162]

Psychedelic music of the 1960s often sought to replicate the LSD experience, incorporating exotic instrumentation, electric guitars with effects pedals, and elaborate studio techniques. Artists and bands utilized instruments like sitars and tablas, and employed studio effects such as backwards tapes, panning, and phasing.[163][164] Songs such as John Prine's "Illegal Smile" and the Beatles' "Lucy in the Sky with Diamonds" have been associated with LSD, although the latter's authors denied such claims.[165][page needed][166]

Contemporary artists influenced by LSD include Keith Haring in the visual arts,[167] various electronic dance music creators,[168] and the jam band Phish.[169] The 2018 Leo Butler play All You Need is LSD is inspired by the author's interest in the history of LSD.[170]

Legal status

The United Nations Convention on Psychotropic Substances of 1971 mandates that signing parties, including the United States, Australia, New Zealand, and most of Europe, prohibit LSD. Enforcement of these laws varies by country. The convention allows medical and scientific research with LSD.[171]

Australia

In Australia, LSD is classified as a Schedule 9 prohibited substance under the Poisons Standard (February 2017), indicating it may be abused or misused and its manufacture, possession, sale, or use should be prohibited except for approved research purposes.[172] In Western Australia, the Misuse of Drugs Act 1981 provides guidelines for possession and trafficking of substances like LSD.[173]

Canada

In Canada, LSD is listed under Schedule III of the Controlled Drugs and Substances Act. Unauthorized possession and trafficking of the substance can lead to significant legal penalties.[54]

United Kingdom

In the United Kingdom, LSD is a Class A drug under the Misuse of Drugs Act 1971, making unauthorized possession and trafficking punishable by severe penalties. The Runciman Report and Transform Drug Policy Foundation have made recommendations and proposals regarding the legal regulation of LSD and other psychedelics.[174][175]

United States

In the United States, LSD is classified as a Schedule I controlled substance under the Controlled Substances Act of 1970, making its manufacture, possession, and distribution illegal without a DEA license. The law considers LSD to have a high potential for abuse, no legitimate medical use, and to be unsafe even under medical supervision. The US Supreme Court case Neal v. United States (1995) clarified the sentencing guidelines related to LSD possession.[176]

Oregon decriminalized personal possession of small amounts of drugs, including LSD, in February 2021, and California has seen legislative efforts to decriminalize psychedelics.[177]

Mexico

Mexico decriminalized the possession of small amounts of drugs, including LSD, for personal use in 2009. The law specifies possession limits and establishes that possession is not a crime within designated quantities.[178]

Czech Republic

In the Czech Republic, possession of "amount larger than small" of LSD is criminalized, while possession of smaller amounts is a misdemeanor. The definition of "amount larger than small" is determined by judicial practice and specific regulations.[179][180]

Economics

Production

Glassware seized by the DEA

An active dose of LSD is very minute, allowing a large number of doses to be synthesized from a comparatively small amount of raw material. Twenty five kilograms of precursor ergotamine tartrate can produce 5–6 kg of pure crystalline LSD; this corresponds to around 50–60 million doses at 100 µg. Because the masses involved are so small, concealing and transporting illicit LSD is much easier than smuggling cocaine, cannabis, or other illegal drugs.[181]

Manufacturing LSD requires laboratory equipment and experience in the field of organic chemistry. It takes two to three days to produce 30 to 100 grams of pure compound. It is believed that LSD is not usually produced in large quantities, but rather in a series of small batches. This technique minimizes the loss of precursor chemicals in case a step does not work as expected.[181]

Forms
Five doses of LSD, often called a "five strip"

LSD is produced in crystalline form and is then mixed with excipients or redissolved for production in ingestible forms. Liquid solution is either distributed in small vials or, more commonly, sprayed onto or soaked into a distribution medium. Historically, LSD solutions were first sold on sugar cubes, but practical considerations forced a change to tablet form. Appearing in 1968 as an orange tablet measuring about 6 mm across, "Orange Sunshine" acid was the first largely available form of LSD after its possession was made illegal. Tim Scully, a prominent chemist, made some of these tablets, but said that most "Sunshine" in the USA came by way of Ronald Stark, who imported approximately thirty-five million doses from Europe.[182]

Over a period of time, tablet dimensions, weight, shape and concentration of LSD evolved from large (4.5–8.1 mm diameter), heavyweight (≥150 mg), round, high concentration (90–350 µg/tab) dosage units to small (2.0–3.5 mm diameter) lightweight (as low as 4.7 mg/tab), variously shaped, lower concentration (12–85 µg/tab, average range 30–40 µg/tab) dosage units. LSD tablet shapes have included cylinders, cones, stars, spacecraft, and heart shapes. The smallest tablets became known as "Microdots."[183]

After tablets came "computer acid" or "blotter paper LSD," typically made by dipping a preprinted sheet of blotting paper into an LSD/water/alcohol solution.[182][183] More than 200 types of LSD tablets have been encountered since 1969 and more than 350 blotter paper designs have been observed since 1975.[183] About the same time as blotter paper LSD came "Windowpane" (AKA "Clearlight"), which contained LSD inside a thin gelatin square a quarter of an inch (6 mm) across.[182] LSD has been sold under a wide variety of often short-lived and regionally restricted street names including Acid, Trips, Uncle Sid, Blotter, Lucy, Alice and doses, as well as names that reflect the designs on the sheets of blotter paper.[52][184] Authorities have encountered the drug in other forms—including powder or crystal, and capsule.[185]

Modern distribution

LSD manufacturers and traffickers in the United States can be categorized into two groups: A few large-scale producers, and an equally limited number of small, clandestine chemists, consisting of independent producers who, operating on a comparatively limited scale, can be found throughout the country.[186][187]

As a group, independent producers are of less concern to the Drug Enforcement Administration than the large-scale groups because their product reaches only local markets.[145]

Many LSD dealers and chemists describe a religious or humanitarian purpose that motivates their illicit activity. Nicholas Schou's book Orange Sunshine: The Brotherhood of Eternal Love and Its Quest to Spread Peace, Love, and Acid to the World describes one such group, the Brotherhood of Eternal Love. The group was a major American LSD trafficking group in the late 1960s and early 1970s.[188]

In the second half of the 20th century, dealers and chemists loosely associated with the

Leonard Pickard played an essential role in distributing LSD.[161]

Mimics
LSD blotter acid mimic actually containing DOC
Different blotters which could possibly be mimics

Since 2005, law enforcement in the United States and elsewhere has seized several chemicals and combinations of chemicals in blotter paper which were sold as LSD mimics, including

DOB.[193] Many mimics are toxic in comparatively small doses, or have extremely different safety profiles. Many street users of LSD are often under the impression that blotter paper which is actively hallucinogenic can only be LSD because that is the only chemical with low enough doses to fit on a small square of blotter paper. While it is true that LSD requires lower doses than most other hallucinogens, blotter paper is capable of absorbing a much larger amount of material. The DEA performed a chromatographic analysis of blotter paper containing 2C-C which showed that the paper contained a much greater concentration of the active chemical than typical LSD doses, although the exact quantity was not determined.[194] Blotter LSD mimics can have relatively small dose squares; a sample of blotter paper containing DOC seized by Concord, California police had dose markings approximately 6 mm apart.[195] Several deaths have been attributed to 25I-NBOMe.[196][197][198][199]

Research

In the United States the earliest research began in the 1950s. Albert Kurland and his colleagues published research on LSD's therapeutic potential to treat schizophrenia. In Canada, Humphrey Osmond and Abram Hoffer completed LSD studies as early as 1952.[200] By the 1960s, controversies surrounding "hippie" counterculture began to deplete institutional support for continued studies.

Currently, a number of organizations—including the Beckley Foundation, MAPS, Heffter Research Institute and the Albert Hofmann Foundation—exist to fund, encourage and coordinate research into the medicinal and spiritual uses of LSD and related psychedelics.[201] New clinical LSD experiments in humans started in 2009 for the first time in 35 years.[202] As it is illegal in many areas of the world, potential medical uses are difficult to study.[43]

In 2001 the

model psychosis", and does not generate immediate personality change."[145] More recently, experimental uses of LSD have included the treatment of alcoholism,[203] pain and cluster headache relief,[7] and prospective studies on depression.[204][205]

A 2020 meta-review indicated possible positive effects of LSD in reducing psychiatric symptoms, mainly in cases of alcoholism.[206] There is evidence that psychedelics induce molecular and cellular adaptations related to neuroplasticity and that these could potentially underlie therapeutic benefits.[207][208]

Psychedelic therapy

See also: Psychedelic therapy

In the 1950s and 1960s, LSD was used in psychiatry to enhance psychotherapy, known as psychedelic therapy. Some psychiatrists, such as Ronald A. Sandison, who pioneered its use at Powick Hospital in England, believed LSD was especially useful at helping patients to "unblock" repressed subconscious material through other psychotherapeutic methods,[209] and also for treating alcoholism.[210][211] One study concluded, "The root of the therapeutic value of the LSD experience is its potential for producing self-acceptance and self-surrender,"[34] presumably by forcing the user to face issues and problems in that individual's psyche.

Two recent reviews concluded that conclusions drawn from most of these early trials are unreliable due to serious

control groups, lack of followup, and vague criteria for therapeutic outcome. In many cases studies failed to convincingly demonstrate whether the drug or the therapeutic interaction was responsible for any beneficial effects.[212][213]

In recent years, organizations like the Multidisciplinary Association for Psychedelic Studies have renewed clinical research of LSD.[202]

It has been proposed that LSD be studied for use in the therapeutic setting, particularly in anxiety.[45][46][214][215]

Other uses

In the 1950s and 1960s, some psychiatrists (e.g. Oscar Janiger) explored the potential effect of LSD on creativity. Experimental studies attempted to measure the effect of LSD on creative activity and aesthetic appreciation.[53][216][217][218] In 1966 Dr. James Fadiman conducted a study with the central question "How can psychedelics be used to facilitate problem solving?" This study attempted to solve 44 different problems and had 40 satisfactory solutions when the FDA banned all research into psychedelics. LSD was a key component of this study.[219][220]

Since 2008 there has been ongoing research into using LSD to alleviate anxiety for terminally ill cancer patients coping with their impending deaths.[45][202][221]

A 2012 meta-analysis found evidence that a single dose of LSD in conjunction with various alcoholism treatment programs was associated with a decrease in alcohol abuse, lasting for several months, but no effect was seen at one year. Adverse events included seizure, moderate confusion and agitation, nausea, vomiting, and acting in a bizarre fashion.[35]

LSD has been used as a treatment for cluster headaches with positive results in some small studies.[7]

Recently, researchers discovered that LSD is a potent

neural plasticity that may have wide-ranging therapeutic benefit.[222] LSD has been shown to increase markers of neuroplasticity in human brain organoids and improve memory performance in human subjects.[223]

LSD may have analgesic properties related to pain in terminally ill patients and phantom pain and may be useful for treating inflammatory diseases including rheumatoid arthritis.[224]

Notable individuals

Some notable individuals have commented publicly on their experiences with LSD.

psychiatric
treatment in the 1950s and 1960s. Still others describe experiences with illegal LSD, obtained for philosophic, artistic, therapeutic, spiritual, or recreational purposes.

  • W. H. Auden, the poet, said, "I myself have taken mescaline once and L.S.D. once. Aside from a slight schizophrenic dissociation of the I from the Not-I, including my body, nothing happened at all."[227] He also said, "LSD was a complete frost. … What it does seem to destroy is the power of communication. I have listened to tapes done by highly articulate people under LSD, for example, and they talk absolute drivel. They may have seen something interesting, but they certainly lose either the power or the wish to communicate."[228] He also said, "Nothing much happened but I did get the distinct impression that some birds were trying to communicate with me."[229]
  • Daniel Ellsberg, an American peace activist, says he has had several hundred experiences with psychedelics.[230]
  • Richard Feynman, a notable physicist at California Institute of Technology, tried LSD during his professorship at Caltech. Feynman largely sidestepped the issue when dictating his anecdotes; he mentions it in passing in the "O Americano, Outra Vez" section.[231][232]
  • Relix Magazine, in response to the question "Have your feelings about LSD changed over the years?," "They haven't changed much. My feelings about LSD are mixed. It's something that I both fear and that I love at the same time. I never take any psychedelic, have a psychedelic experience, without having that feeling of, "I don't know what's going to happen." In that sense, it's still fundamentally an enigma and a mystery."[233]
  • Bill Gates implied in an interview with Playboy that he tried LSD during his youth.[234]
  • Aldous Huxley, author of Brave New World, became a user of psychedelics after moving to Hollywood. He was at the forefront of the counterculture's use of psychedelic drugs, which led to his 1954 work The Doors of Perception. Dying from cancer, he asked his wife on 22 November 1963 to inject him with 100 µg of LSD. He died later that day.[235]
  • Steve Jobs, co-founder and former CEO of Apple Inc., said, "Taking LSD was a profound experience, one of the most important things in my life."[236]
  • Ernst Jünger, German writer and philosopher, throughout his life had experimented with drugs such as ether, cocaine, and hashish; and later in life he used mescaline and LSD. These experiments were recorded comprehensively in Annäherungen (1970, Approaches). The novel Besuch auf Godenholm (1952, Visit to Godenholm) is clearly influenced by his early experiments with mescaline and LSD. He met with LSD inventor Albert Hofmann and they took LSD together several times. Hofmann's memoir LSD, My Problem Child describes some of these meetings.[237]
  • In a 2004 interview, Paul McCartney said that The Beatles' songs "Day Tripper" and "Lucy in the Sky with Diamonds" were inspired by LSD trips.[165]: 182  Nonetheless, John Lennon consistently stated over the course of many years that the fact that the initials of "Lucy in the Sky with Diamonds" spelled out L-S-D was a coincidence (he stated that the title came from a picture drawn by his son Julian) and that the band members did not notice until after the song had been released, and Paul McCartney corroborated that story.[238] John Lennon, George Harrison, and Ringo Starr also used the drug, although McCartney cautioned that "it's easy to overestimate the influence of drugs on the Beatles' music."[239]
  • Michel Foucault had an LSD experience with Simeon Wade in the Death Valley and later wrote "it was the greatest experience of his life, and that it profoundly changed his life and his work."[240][241] According to Wade, as soon as he came back to Paris, Foucault scrapped the second History of Sexuality's manuscript, and totally rethought the whole project.[242]
  • Kary Mullis is reported to credit LSD with helping him develop DNA amplification technology, for which he received the Nobel Prize in Chemistry in 1993.[243]
  • Carlo Rovelli, an Italian theoretical physicist and writer, has credited his use of LSD with sparking his interest in theoretical physics.[244]
  • neurologist famous for writing best-selling case histories about his patients' disorders and unusual experiences, talks about his own experiences with LSD and other perception altering chemicals, in his book, Hallucinations.[245]
  • Matt Stone and Trey Parker, creators of the TV series South Park, claimed to have shown up at the 72nd Academy Awards, at which they were nominated for Best Original Song, under the influence of LSD.[246]

See also

Notes

  1. ^ Although cross-tolerance to DMT is noted as negligible,[84] some reports suggest that LSD-tolerant individuals showed undiminished responses to DMT.[85]
  2. ^ The potency of N-benzylphenethylamines via buccal, sublingual, or nasal absorption is 50–100 greater (by weight) than oral route compared to the parent 2C-x compounds.[101] Researches hypothesize the low oral metabolic stability of N-benzylphenethylamines is likely causing the low bioavailability on the oral route, although the metabolic profile of this compounds remains unpredictable; therefore researches state that the fatalities linked to these substances may partly be explained by differences in the metabolism between individuals.[101]

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Further reading

External links

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Documentaries

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