Cannabis (drug)

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"Marijuana" redirects here. For other uses, see Marijuana (disambiguation).

Cannabis
Active ingredients
Tetrahydrocannabinol, cannabidiol, cannabinol, tetrahydrocannabivarin
Main producersAfghanistan, Canada, China, Colombia, India, Jamaica, Lebanon, Mexico, Morocco, Netherlands, Pakistan, Paraguay, Spain, Thailand, Turkey, United Kingdom, United States
Legal status
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Cannabis
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  • Blue Dream
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Cannabis,[a] also known as marijuana[b] or weed among other names, is a psychoactive drug from the cannabis plant. Native to Central or South Asia, the cannabis plant has been used as a drug for both recreational and entheogenic purposes and in various traditional medicines for centuries. Tetrahydrocannabinol (THC) is the main psychoactive component of cannabis, which is one of the 483 known compounds in the plant, including at least 65 other cannabinoids, such as cannabidiol (CBD). Cannabis can be used by smoking, vaporizing, within food, or as an extract.

Cannabis has

psychosis. There is a strong relation between cannabis use and the risk of psychosis, though the direction of causality is debated. Physical effects include increased heart rate, difficulty breathing, nausea, and behavioral problems in children whose mothers used cannabis during pregnancy; short-term side effects may also include dry mouth and red eyes. Long-term adverse effects may include addiction, decreased mental ability in those who started regular use as adolescents,[3] chronic coughing, susceptibility to respiratory infections, and cannabinoid hyperemesis syndrome
.

Cannabis is mostly used recreationally or as a medicinal drug, although it may also be used for spiritual purposes. In 2013, between 128 and 232 million people used cannabis (2.7% to 4.9% of the global population between the ages of 15 and 65). It is the most commonly used largely-illegal drug in the world, with the highest use among adults in Zambia, the United States, Canada, and Nigeria. Since the 1970s, the potency of illicit cannabis has increased, with THC levels rising and CBD levels dropping.

Cannabis plants have been grown since at least the 3rd millennium BCE and there is evidence of it being smoked for its psychoactive effects around 500 BCE in the

federally illegal. In Australia, it is legalized only in the Australian Capital Territory
.

Etymology

The word is borrowed from Latin cannabis ("hemp"), from Ancient Greek κάνναβις (kánnabis).[citation needed]

The first reference to marihuana was found in 1842 in Mexican newspapers, and then the term made its way to the U.S. in the 1890s.[4]

Uses

Medical

Main article: Medical cannabis
Example of a container and the recreational cannabis purchase in Canada

Medical cannabis, or medical marijuana, refers to the use of cannabis to treat disease or improve symptoms; however, there is no single agreed-upon definition (e.g.,

muscle spasms. Evidence for its use for other medical applications is insufficient for drawing conclusions about safety or efficacy.[9][10][11] There is evidence supporting the use of cannabis or its derivatives in the treatment of chemotherapy-induced nausea and vomiting, neuropathic pain, and multiple sclerosis. Lower levels of evidence support its use for AIDS wasting syndrome, epilepsy, rheumatoid arthritis, and glaucoma.[12]

The medical use of cannabis is legal only in a limited number of territories, including Canada,[13] Belgium, Australia, the Netherlands, New Zealand,[14][15] Spain, and many U.S. states. This usage generally requires a prescription, and distribution is usually done within a framework defined by local laws.[12]

Recreational

According to DEA Chief Administrative Law Judge, Francis Young, "cannabis is one of the safest therapeutically active substances known to man".[16] Being under the effects of cannabis is usually referred to as being "high".[17] Cannabis consumption has both psychoactive and physiological effects.[18] The "high" experience can vary widely, based (among other things) on the user's prior experience with cannabis, and the type of cannabis consumed.[19]: p647  When smoking cannabis, a euphoriant effect can occur within minutes of smoking.[20]: p104  Aside from a subjective change in perception and mood, the most common short-term physical and neurological effects include increased heart rate, increased appetite, impairment of short-term and working memory, and psychomotor coordination.[21][22]

Additional desired effects from consuming cannabis include relaxation, a general alteration of conscious perception, increased awareness of sensation, increased libido[23] and distortions in the perception of time and space. At higher doses, effects can include altered body image, auditory and/or visual illusions, pseudohallucinations and ataxia from selective impairment of polysynaptic reflexes.[citation needed] In some cases, cannabis can lead to dissociative states such as depersonalization[24][25] and derealization.[26]

Spiritual

Main article: Entheogenic use of cannabis

Cannabis has held sacred status in several religions and has served as an

Atharva Veda, estimated to have been composed sometime around 1400 BCE.[28]
The Hindu god Shiva is described as a cannabis user, known as the "Lord of bhang".[29]: p19 

In modern culture, the spiritual use of cannabis has been spread by the disciples of the

Rastafari movement who use cannabis as a sacrament and as an aid to meditation.[28]

Consumption

Main article: Cannabis consumption

Modes of consumption

A joint prior to rolling, with a paper handmade filter on the left

Many different ways to consume cannabis involve heat to decarboxylate THCA into THC;[30][31] common modes include:

Consumption by country

Main article:
Annual cannabis use by country
Global estimates of drug users in 2016
(in millions of users)[37]
Substance Best
estimate		 Low
estimate		 High
estimate
Amphetamine-
type stimulants
 34.16 13.42 55.24
Cannabis 192.15 165.76 234.06
Cocaine 18.20 13.87 22.85
Ecstasy 20.57 8.99 32.34
Opiates 19.38 13.80 26.15
Opioids 34.26 27.01 44.54

In 2013, between 128 and 232 million people used cannabis (2.7% to 4.9% of the global population between the ages of 15 and 65).[38] Cannabis is by far the most widely used illicit substance,[39] with the highest use among adults (as of 2018) in Zambia, the United States, Canada, and Nigeria.[40]

United States

Between 1973 and 1978, eleven states decriminalized marijuana.[41] In 2001, Nevada reduced marijuana possession to a misdemeanor and since 2012, several other states have decriminalized and even legalized marijuana.[41]

In 2018, surveys indicated that almost half of the people in the United States had tried marijuana, 16% had used it in the past year, and 11% had used it in the past month.[42] In 2014, surveys said daily marijuana use amongst US college students had reached its highest level since records began in 1980, rising from 3.5% in 2007 to 5.9% in 2014 and had surpassed daily cigarette use.[43]

In the US, men are over twice as likely to use marijuana as women, and 18–29-year-olds are six times more likely to use as over-65-year-olds.[44] In 2015, a record 44% of the US population has tried marijuana in their lifetime, an increase from 38% in 2013 and 33% in 1985.[44]

Marijuana use in the United States is three times above the global average, but in line with other Western democracies. Forty-four percent of American 12th graders have tried the drug at least once, and the typical age of first-use is 16, similar to the typical age of first-use for alcohol but lower than the first-use age for other illicit drugs.[39]

A 2022 Gallup poll concluded Americans are smoking more marijuana than cigarettes for the first time.[45]

Adverse effects

Further information: Effects of cannabis

Short-term

Main short-term physical effects of cannabis

Acute negative effects may include anxiety and panic, impaired attention and memory, an increased risk of psychotic symptoms,[c] the inability to think clearly, and an increased risk of accidents.[48][49][50] Cannabis impairs a person's driving ability, and THC was the illicit drug most frequently found in the blood of drivers who have been involved in vehicle crashes. Those with THC in their system are from three to seven times more likely to be the cause of the accident than those who had not used either cannabis or alcohol, although its role is not necessarily causal because THC stays in the bloodstream for days to weeks after intoxication.[51][52][d]

Some immediate undesired side effects include a decrease in short-term memory, dry mouth, impaired motor skills, reddening of the eyes,[55] dizziness, feeling tired and vomiting.[10] Some users may experience an episode of acute psychosis, which usually abates after six hours, but in rare instances, heavy users may find the symptoms continuing for many days.[56]

Legalization has increased the rates at which children are exposed to cannabis, particularly from edibles. While the toxicity and lethality of THC in children is not known, they are at risk for encephalopathy, hypotension, respiratory depression severe enough to require ventilation, somnolence and coma.[57][58]

Fatality

There is no clear evidence for a link between cannabis use and deaths from cardiovascular disease, but a 2019 review noted that it may be an under-reported, contributory factor or direct cause in cases of sudden

cardiovascular system. Some deaths have also been attributed to cannabinoid hyperemesis syndrome.[59] There is an association between cannabis use and suicide, particularly in younger users.[60]

A 16-month survey of Oregon and Alaska emergency departments found a report of the death of an adult who had been admitted for acute cannabis toxicity.[61]

Long-term

Main article: Long-term effects of cannabis
Addiction experts in psychiatry, chemistry, pharmacology, forensic science, epidemiology, and the police and legal services engaged in delphic analysis regarding 20 popular recreational drugs. Cannabis was ranked 11th in dependence, 17th in physical harm, and 10th in social harm.[62]

Psychological effects

A 2015 meta-analysis found that, although a longer period of abstinence was associated with smaller magnitudes of impairment, both retrospective and prospective memory were impaired in cannabis users. The authors concluded that some, but not all, of the deficits associated with cannabis use were reversible.

executive functions.[66] Impairments in executive functioning are most consistently found in older populations, which may reflect heavier cannabis exposure, or developmental effects associated with adolescent cannabis use.[67] One review found three prospective cohort studies that examined the relationship between self-reported cannabis use and intelligence quotient (IQ). The study following the largest number of heavy cannabis users reported that IQ declined between ages 7–13 and age 38. Poorer school performance and increased incidence of leaving school early were both associated with cannabis use, although a causal relationship was not established.[68] Cannabis users demonstrated increased activity in task-related brain regions, consistent with reduced processing efficiency.[69]

A reduced

cause and effect, however, is unclear.[70]

The

memory and cognition problems, risk of addiction, and the risk of schizophrenia in young people.[9]

Neuroimaging

Although global abnormalities in white matter and grey matter are not consistently associated with heavy cannabis use,[71] reduced hippocampal volume is consistently found.[72] Amygdala abnormalities are sometimes reported, although findings are inconsistent.[73][74][75]

Cannabis use is associated with increased recruitment of task-related areas, such as the

glutamate metabolites in the human brain.[79]

Cannabis dependence

Main article:
Cannabis dependence

About 9% of those who experiment with marijuana eventually become dependent according to DSM-IV (1994) criteria.[12] A 2013 review estimates daily use is associated with a 10–20% rate of dependence.[9] The highest risk of cannabis dependence is found in those with a history of poor academic achievement, deviant behavior in childhood and adolescence, rebelliousness, poor parental relationships, or a parental history of drug and alcohol problems.[80] Of daily users, about 50% experience withdrawal upon cessation of use (i.e. are dependent), characterized by sleep problems, irritability, dysphoria, and craving.[68] Cannabis withdrawal is less severe than withdrawal from alcohol.[81]

According to

DSM-V criteria, 9% of those who are exposed to cannabis develop cannabis use disorder, compared to 20% for cocaine, 23% for alcohol and 68% for nicotine. Cannabis use disorder in the DSM-V involves a combination of DSM-IV criteria for cannabis abuse and dependence, plus the addition of craving, without the criterion related to legal troubles.[68]

Psychiatric

See also: Long-term effects of cannabis § Mental health

At an epidemiological level, a dose–response relationship exists between cannabis use and increased risk of psychosis[82][83][84][85] and earlier onset of psychosis.[86] Although the epidemiological association is robust, evidence to prove a causal relationship is lacking.[87]

Cannabis may also increase the risk of depression, but insufficient research has been performed to draw a conclusion.[88][84] Cannabis use is associated with increased risk of anxiety disorders, although causality has not been established.[89]

A review in 2019 found that research was insufficient to determine the safety and efficacy of using cannabis to treat schizophrenia, psychosis, or other mental disorders.[90][91] Another found that cannabis during adolescence was associated with an increased risk of developing depression and suicidal behavior later in life, while finding no effect on anxiety.[92]

Physical

Heavy, long-term exposure to marijuana may have physical, mental, behavioral and social health consequences. It may be "associated with diseases of the liver (particularly with co-existing hepatitis C), lungs, heart, and vasculature".[93] A 2014 review found that while cannabis use may be less harmful than alcohol use, the recommendation to substitute it for problematic drinking was premature without further study.[94] Various surveys conducted between 2015 and 2019 found that many users of cannabis substitute it for prescription drugs (including opioids), alcohol, and tobacco; most of those who used it in place of alcohol or tobacco either reduced or stopped their intake of the latter substances.[95]

Cannabinoid hyperemesis syndrome (CHS) is a severe condition seen in some chronic cannabis users where they have repeated bouts of uncontrollable vomiting for 24–48 hours. Four cases of death have been reported as a result of CHS.[96][97]

A limited number of studies have examined the

bronchodilation.[101] Other side effects of cannabis use include cannabinoid hyperemesis syndrome (CHS), a condition which involves recurrent nausea, cramping abdominal pain, and vomiting.[102]

Cannabis smoke contains thousands of organic and inorganic chemical compounds. This

cannabis foods.[111]

There is concern that cannabis may contribute to cardiovascular disease,[112] but as of 2018, evidence of this relationship was unclear.[113] Research in these events is complicated because cannabis is often used in conjunction with tobacco, and drugs such as alcohol and cocaine that are known to have cardiovascular risk factors.[114] Smoking cannabis has also been shown to increase the risk of myocardial infarction by 4.8 times for the 60 minutes after consumption.[115]

There is preliminary evidence that cannabis interferes with the anticoagulant properties of prescription drugs used for treating blood clots.[116] As of 2019, the mechanisms for the anti-inflammatory and possible pain relieving effects of cannabis were not defined, and there were no governmental regulatory approvals or clinical practices for use of cannabis as a drug.[91]

Emergency department visits

Emergency room (ER) admissions associated with cannabis use rose significantly from 2012 to 2016; adolescents from age 12–17 had the highest risk.[117] At one Colorado medical center following legalization, approximately two percent of ER admissions were classified as cannabis users. The symptoms of one quarter of these users were partially attributed to cannabis (a total of 2567 out of 449,031 patients); other drugs were sometimes involved. Of these cannabis admissions, one quarter were for acute psychiatric effects, primarily suicidal ideation, depression, and anxiety. An additional third of the cases were for gastrointestinal issues including Cannabinoid hyperemesis syndrome.[118]

According to the United States Department of Health and Human Services, there were 455,000 emergency room visits associated with cannabis use in 2011. These statistics include visits in which the patient was treated for a condition induced by or related to recent cannabis use. The drug use must be "implicated" in the emergency department visit, but does not need to be the direct cause of the visit. Most of the illicit drug emergency room visits involved multiple drugs.[119] In 129,000 cases, cannabis was the only implicated drug.[119][12]

Reproductive health

Further information: Cannabis in pregnancy

There is sufficient evidence of reproductive health harms from cannabis that its use when trying to conceive, during pregnancy, and while breastfeeding, is not advisable.[120]

It has been recommended that cannabis use be stopped before and during pregnancy as it can result in negative outcomes for both the mother and baby,[121][122] such as behavioral problems.[123] However, maternal use of marijuana during pregnancy does not appear to be associated with low birth weight or early delivery after controlling for tobacco use and other confounding factors.[124]

Pharmacology

Mechanism of action

See also: Effects of cannabis § Biochemical mechanisms in the brain

THC is a weak partial agonist at

CB1 receptor antagonist.[125][126]
The CB1 receptor is found primarily in the brain as well as in some peripheral tissues, and the CB2 receptor is found primarily in peripheral tissues, but is also expressed in
adenylate cyclase
) in a dose-dependent manner.

Via CB1 receptor activation, THC indirectly increases

psychotropic effects.[128] CBD also acts as an allosteric modulator of the μ- and δ-opioid receptors.[129] THC also potentiates the effects of the glycine receptors.[130] It is unknown if or how these actions contribute to the effects of cannabis.[131]

Pharmacokinetics

The high lipid-solubility of cannabinoids results in their persisting in the body for long periods of time.[132] Even after a single administration of THC, detectable levels of THC can be found in the body for weeks or longer (depending on the amount administered and the sensitivity of the assessment method).[132] Investigators have suggested that this is an important factor in marijuana's effects, perhaps because cannabinoids may accumulate in the body, particularly in the lipid membranes of neurons.[133]

Chemistry

Chemical composition

See also:
Difference between C. indica and C. sativa

The main psychoactive component of cannabis is

carboxylic acids.[citation needed] THC is one of the 483 known compounds in the plant,[134] including at least 65 other cannabinoids,[135] such as cannabidiol (CBD).[50]

Detection in body fluids

Main article: Cannabis drug testing

THC and its major (inactive) metabolite, THC-COOH, can be measured in blood, urine, hair, oral fluid or sweat using

chromatographic techniques as part of a drug use testing program or a forensic investigation of a traffic or other criminal offense.[56] The concentrations obtained from such analyses can often be helpful in distinguishing active use from passive exposure, elapsed time since use, and extent or duration of use. These tests cannot, however, distinguish authorized cannabis smoking for medical purposes from unauthorized recreational smoking.[136] Commercial cannabinoid immunoassays, often employed as the initial screening method when testing physiological specimens for marijuana presence, have different degrees of cross-reactivity with THC and its metabolites.[137] Urine contains predominantly THC-COOH, while hair, oral fluid and sweat contain primarily THC.[56] Blood may contain both substances, with the relative amounts dependent on the recency and extent of usage.[56]

The

Duquenois–Levine test is commonly used as a screening test in the field, but it cannot definitively confirm the presence of cannabis, as a large range of substances have been shown to give false positives.[138] Researchers at John Jay College of Criminal Justice reported that dietary zinc supplements can mask the presence of THC and other drugs in urine.[139] However, a 2013 study conducted by researchers at the University of Utah School of Medicine refute the possibility of self-administered zinc producing false-negative urine drug tests.[140]

Varieties and strains

Types of cannabis
A macro cannabis bud

CBD is a 5-HT1A receptor agonist, which is under laboratory research to determine if it has an anxiolytic effect.[141] It is often claimed that sativa strains provide a more stimulating psychoactive high while indica strains are more sedating with a body high.[142] However, this is disputed by researchers.[143]

A 2015 review found that the use of high CBD-to-THC strains of cannabis showed significantly fewer

cognitive function and both lower risk for developing psychosis, as well as a later age of onset of the illness, compared to cannabis with low CBD-to-THC ratios.[144]

Psychoactive ingredients

According to the United Nations Office on Drugs and Crime (UNODC), "the amount of THC present in a cannabis sample is generally used as a measure of cannabis potency."[145] The three main forms of cannabis products are the flower/fruit, resin (hashish), and oil (hash oil). The UNODC states that cannabis often contains 5% THC content, resin "can contain up to 20% THC content", and that "Cannabis oil may contain more than 60% THC content."[145]

Studies have found that the potency of illicit cannabis has greatly increased since the 1970s, with THC levels rising and CBD levels dropping.[146][147][148] It is unclear, however, whether the increase in THC content has caused people to consume more THC or if users adjust based on the potency of the cannabis. It is likely that the higher THC content allows people to ingest less tar. At the same time, CBD levels in seized samples have lowered, in part because of the desire to produce higher THC levels and because more illegal growers cultivate indoors using artificial lights. This helps avoid detection but reduces the CBD production of the plant.[149]

Australia's National Cannabis Prevention and Information Centre (NCPIC) states that the buds (infructescences) of the female cannabis plant contain the highest concentration of THC, followed by the leaves. The stalks and seeds have "much lower THC levels".[150] The UN states that the leaves can contain ten times less THC than the buds, and the stalks one hundred times less THC.[145]

After revisions to

skunk accounts for between 70 and 80% of samples seized by police[151] (despite the fact that skunk can sometimes be incorrectly mistaken for all types of herbal cannabis).[152][153] Extracts such as hashish and hash oil typically contain more THC than high potency cannabis infructescences.[154]

Laced cannabis and synthetic cannabinoids

See also: Synthetic cannabinoids § Hemp (or low potent cannabis) buds

Hemp buds (or low-potency cannabis buds) laced with synthetic cannabinoids started to be sold as cannabis street drug in 2020.[155][156][157][158]

The short-term effects of cannabis can be altered if it has been laced with opioid drugs such as heroin or fentanyl.[159] The added drugs are meant to enhance the psychoactive properties, add to its weight, and increase profitability, despite the increased danger of overdose.[160][e]

Preparations

  • Dried flower buds (marijuana)
    Dried flower buds (marijuana)
  • A gram of kief
    A gram of kief
  • Hashish
    Hashish
  • Hash oil
    Hash oil
  • Infusion (dairy butter)
    Infusion (dairy butter)

Marijuana

Further information: Marijuana (word)

Marijuana or marihuana (herbal cannabis)[162] consists of the dried flowers and fruits and subtending leaves and stems of the female cannabis plant.[163][164][165][166] This is the most widely consumed form,[166] containing 3% to 20% THC,[167] with reports of up to 33% THC.[168] This is the stock material from which all other preparations are derived. Although herbal cannabis and industrial hemp derive from the same species and contain the psychoactive component (THC), they are distinct strains with unique biochemical compositions and uses. Hemp has lower concentrations of THC and higher concentrations of CBD, which gives lesser psychoactive effects.[169][170]

Kief

Main article: Kief

Kief is a powder, rich in

colloquial Arabic كيف kēf/kīf, meaning pleasure.[173]

Hashish

Main article: Hashish
Legal hashish shop in Kathmandu, Nepal in 1973
Legal hashish shop in Kathmandu, Nepal in 1973

Hashish (also spelled hasheesh, hashisha, or simply hash) is a concentrated resin cake or ball produced from pressed kief, the detached trichomes and fine material that falls off cannabis fruits, flowers and leaves.[174] or from scraping the resin from the surface of the plants and rolling it into balls. It varies in color from black to golden brown depending upon purity and variety of cultivar it was obtained from.[175] It can be consumed orally or smoked, and is also vaporized, or 'vaped'.[176] The term "rosin hash" refers to a high quality solventless product obtained through heat and pressure.[177]

Tincture

Main article: Tincture of cannabis

Cannabinoids can be

spirits (often grain alcohol) to create a tincture, often referred to as "green dragon".[29]: p17  Nabiximols is a branded product name from a tincture manufacturing pharmaceutical company.[178]

Hash oil

Main article: Hash oil

Hash oil is a

solvent extraction,[179] formed into a hardened or viscous mass.[180] Hash oil can be the most potent of the main cannabis products because of its high level of psychoactive compound per its volume, which can vary depending on the plant's mix of essential oils and psychoactive compounds.[181] Butane and supercritical carbon dioxide hash oil have become popular in recent years.[182]

Infusions

There are many varieties of cannabis infusions owing to the variety of non-volatile solvents used.

cannabis foods or applied topically.[184]

Marihuana prensada

Main article: Marihuana prensada

Marihuana prensada ('pressed marijuana') is a cannabis-derived product widespread among the lower classes of South America,[185] especially from the 90s. Locally it is known as "paraguayo" or "paragua", since its main producer is Paraguay.[186] Marijuana is dried and mixed with binding agents that make it toxic and highly harmful to health.[187] It is cut into the shape of bricks (ladrillos) and sold for a low price in Argentina, Brazil, Chile, Peru, Venezuela, and even the United States.[188]

History

Main articles: History of cannabis, Timeline of cannabis law, and Religion and drugs

Ancient history

Present-day map of the Jirzankal Cemetery, site of the earliest evidence of cannabis smoking

Cannabis is

second millennium BC in Turkmenistan.[194]

Cannabis was known to the

ancient Assyrians, who discovered its psychoactive properties through the Iranians.[195] Using it in some religious ceremonies, they called it qunubu (meaning "way to produce smoke"), a probable origin of the modern word "cannabis".[196] The Iranians also introduced cannabis to the Scythians, Thracians and Dacians, whose shamans (the kapnobatai – "those who walk on smoke/clouds") burned cannabis infructescences to induce trance.[197] The plant was used in China before 2800 BC, and found therapeutic use in India by 1000 BC, where it was used in food and drink, including bhang.[198][199]

Cannabis sativa from Vienna Dioscurides, c. 512 CE

Cannabis has an ancient history of ritual use and has been used by religions around the world. It has been used as a drug for both

Sufi orders as early as the Mamluk period, for example by the Qalandars.[205] Smoking pipes uncovered in Ethiopia and carbon-dated to around c. AD 1320 were found to have traces of cannabis.[206]

Modern history

Cannabis was introduced to the

Les paradis artificiels (1860) by Charles Baudelaire and The Hasheesh Eater (1857) by Fitz Hugh Ludlow
.

Anti-cannabis propaganda from 1935

Cannabis was criminalized in some countries beginning in the 14th century and was illegal in most countries by the middle of the 20th century. The colonial government of Mauritius banned cannabis in 1840 over concerns on its effect on Indian indentured workers;

District of Columbia).[214] Canada criminalized cannabis in The Opium and Narcotic Drug Act, 1923,[215] before any reports of the use of the drug in Canada, but eventually legalized its consumption for recreational and medicinal purposes in 2018.[13]

In 1925, a compromise was made at an international conference in The Hague about the International Opium Convention that banned exportation of "Indian hemp" to countries that had prohibited its use, and requiring importing countries to issue certificates approving the importation and stating that the shipment was required "exclusively for medical or scientific purposes". It also required parties to "exercise an effective control of such a nature as to prevent the illicit international traffic in Indian hemp and especially in the resin".[216][217] In the United States in 1937, the Marihuana Tax Act was passed,[218] and prohibited the production of hemp in addition to cannabis.

Cannabis indica fluid extract, American Druggists Syndicate (pre-1937)

In 1972, the Dutch government divided drugs into more- and less-dangerous categories, with cannabis being in the lesser category. Accordingly, possession of 30 grams (1.1 oz) or less was made a misdemeanor.[219] Cannabis has been available for recreational use in coffee shops since 1976.[220] Cannabis products are only sold openly in certain local "coffeeshops" and possession of up to 5 grams (0.18 oz) for personal use is decriminalized, however: the police may still confiscate it, which often happens in car checks near the border. Other types of sales and transportation are not permitted, although the general approach toward cannabis was lenient even before official decriminalization.[221][222][223]

In Uruguay, President

marijuana dispensary
regime.

As of 17 October 2018, when recreational use of cannabis was legalized in Canada,

veterinary health products containing not more than 10 parts per million of THC extract were approved for marketing; Nabiximols (as Sativex) is used as a prescription drug in Canada.[13]

The United Nations' World Drug Report stated that cannabis "was the world's most widely produced, trafficked, and consumed drug in the world in 2010", and estimated between 128 million and 238 million users globally in 2015.[224][225]

Culture, legality and economics

Culture

Main article: Cannabis culture
See also: Drug culture and 420 (cannabis culture)
Process of making bhang in a village in Punjab, India. On the Indian festival of colors, Holi, it is a customary addition to some intoxicating drinks.[226]

Cannabis has been one of the most used

euphoriant and symbol of fellowship."[228][229] The second stream of expansion of cannabis use encompasses "the use of hemp for commercial manufacturers utilizing large-scale cultivation primarily as a fiber for mercantile purposes"; but it is also linked to the search for psychedelic experiences (which can be traced back to the formation of the Parisian Club des Hashischins).[229]

Legality

Main article: Legality of cannabis
See also:
Prohibition of drugs and Drug liberalization
Map of world cannabis laws
Legal status of cannabis possession for non-medical use
  Legal
  Illegal but decriminalized
  Illegal but often unenforced
  Illegal
See also countries that have legalized medical use of cannabis.

Since the beginning of the 20th century, most countries have enacted

laws against the cultivation, possession or transfer of cannabis.[230] These laws have had an adverse effect on cannabis cultivation for non-recreational purposes, but there are many regions where handling of cannabis is legal or licensed. Many jurisdictions have lessened the penalties for possession of small quantities of cannabis so that it is punished by confiscation and sometimes a fine, rather than imprisonment, focusing more on those who traffic the drug on the black market
.

In some areas where cannabis use had been historically tolerated, new restrictions were instituted, such as the closing of cannabis coffee shops near the borders of the Netherlands,[231] and closing of coffee shops near secondary schools in the Netherlands.[232] In Copenhagen, Denmark in 2014, mayor Frank Jensen discussed possibilities for the city to legalize cannabis production and commerce.[233]

Some jurisdictions use free voluntary treatment programs and/or mandatory treatment programs for frequent known users. Simple possession can carry long prison terms in some countries, particularly in East Asia, where the sale of cannabis may lead to a sentence of life in prison or even execution. Political parties, non-profit organizations, and causes based on the legalization of medical cannabis and/or legalizing the plant entirely (with some restrictions) have emerged in such countries as China and Thailand.[234][235]

In December 2012, the U.S. state of

Colorado Amendment 64).[237] On 1 January 2013, the first cannabis "club" for private marijuana smoking (no buying or selling, however) was allowed for the first time in Colorado.[238] The California Supreme Court decided in May 2013 that local governments can ban medical cannabis dispensaries despite a state law in California that permits the use of cannabis for medical purposes. At least 180 cities across California have enacted bans in recent years.[239]

In December 2013, Uruguay became the first country to legalize growing, sale and use of cannabis.[240] After a long delay in implementing the retail component of the law, in 2017 sixteen pharmacies were authorized to sell cannabis commercially.[241] On 19 June 2018, the Canadian Senate passed a bill and the Prime Minister announced the effective legalization date as 17 October 2018.[13][242] Canada is the second country to legalize the drug.[243]

In November 2015, Uttarakhand became the first state of India to legalize the cultivation of hemp for industrial purposes.[244] Usage within the Hindu and Buddhist cultures of the Indian subcontinent is common, with many street vendors in India openly selling products infused with cannabis, and traditional medical practitioners in Sri Lanka selling products infused with cannabis for recreational purposes and well as for religious celebrations.[245] Indian laws criminalizing cannabis date back to the colonial period. India and Sri Lanka have allowed cannabis to be taken in the context of traditional culture for recreational/celebratory purposes and also for medicinal purposes.[245]

On 17 October 2015, Australian health minister Sussan Ley presented a new law that will allow the cultivation of cannabis for scientific research and medical trials on patients.[246]

On 17 October 2018, Canada legalized cannabis for recreational adult use[247] making it the second country in the world to do so after Uruguay and the first G7 nation.[248] This legalization comes with regulation similar to that of alcohol in Canada, age restrictions, limiting home production, distribution, consumption areas and sale times.[249] Laws around use vary from province to province including age limits, retail structure, and growing at home.[247] The Canadian Licensed Producer system aims to become the Gold Standard in the world for safe and secure cannabis production,[250] including provisions for a robust craft cannabis industry where many expect opportunities for experimenting with different strains.[251]

As the drug has increasingly been seen as a health issue instead of criminal behavior, cannabis has also been legalized or decriminalized in: Czech Republic,[252] Colombia,[253][254] Ecuador,[255][256][257] Portugal,[258] South Africa[259] and Canada.[13] Medical marijuana was legalized in Mexico in mid-2017; legislators plan to legalize its recreational use by late 2019.[260][261][262]

Germany legalized cannabis for recreational use in April 2024.[263]

Legal status by country

As of 2022, Uruguay and Canada are the only countries that have fully legalized the cultivation, consumption and bartering of recreational cannabis nationwide.[264][265] In the United States, 24 states, 3 territories, and the District of Columbia have legalized the recreational use of cannabis – though the drug remains illegal at the federal level.[266] Laws vary from state to state when it comes to the commercial sale. Court rulings in Georgia and South Africa have led to the legalization of cannabis consumption, but not legal sales. A policy of limited enforcement has also been adopted in many countries, in particular Spain and the Netherlands where the sale of cannabis is tolerated at licensed establishments.[267][268] Contrary to popular belief, cannabis is not legal in the Netherlands,[269] but it has been decriminalized since the 1970s. In 2021, Malta was the first European Union member to legalize the use of cannabis for recreational purposes.[270] In Estonia, it is only legal to sell cannabis products with a THC content of less than 0.2%, although products may contain more cannabidiol.[271] Lebanon has recently become the first Arab country to legalize the plantation of cannabis for medical use.[272]

Penalties for illegal recreational use ranges from confiscation or small fines to jail time and even death.[273] In some countries citizens can be punished if they have used the drug in another country, including Singapore and South Korea.[274][275]

Economics

Production

Main articles: Cannabis cultivation, Cannabis industry, and Cannabis product testing
Woman selling cannabis and bhang in Guwahati, Assam, India

Sinsemilla (Spanish for "without seed") is the dried, seedless (i.e.

the sea of green method
are frequently employed as a response (in part) to prohibition enforcement efforts that make outdoor cultivation more risky.

"Skunk" refers to several named strains of potent cannabis, grown through selective breeding and sometimes hydroponics. It is a cross-breed of Cannabis sativa and C. indica (although other strains of this mix exist in abundance). Skunk cannabis potency ranges usually from 6% to 15% and rarely as high as 20%. The average THC level in coffee shops in the Netherlands is about 18–19%.[276]

The average levels of THC in cannabis sold in the United States rose dramatically between the 1970s and 2000.[277] This is disputed for various reasons, and there is little consensus as to whether this is a fact or an artifact of poor testing methodologies.[277] According to Daniel Forbes writing for slate.com, the relative strength of modern strains are likely skewed because undue weight is given to much more expensive and potent, but less prevalent, samples.[278] Some suggest that results are skewed by older testing methods that included low-THC-content plant material such as leaves in the samples, which are excluded in contemporary tests. Others believe that modern strains actually are significantly more potent than older ones.[277]

The main producing countries of cannabis are Afghanistan,[279] Canada,[280] China, Colombia,[281] India,[279] Jamaica,[279] Lebanon,[282] Mexico,[283] Morocco,[279] the Netherlands, Pakistan, Paraguay,[283] Spain,[279] Thailand, Turkey, the United Kingdom,[284] and the United States.[279]

Price

The price or street value of cannabis varies widely depending on geographic area and potency.[285] Prices and overall markets have also varied considerably over time.

  • In 1997, cannabis was estimated to be overall the number four value crop in the US, and number one or two in many states, including California, New York, and Florida. This estimate is based on a value to growers of ~60% of retail value, or $3,000 per pound ($6,600/kg).[286]
  • In 2006, cannabis was estimated to have been a $36 billion market.[287] This estimate has been challenged as exaggerated.[39] The UN World Drug Report (2008) estimated that 2006 street prices in the US and Canada ranged from about US$8.8 to $25 per gram (approximately $250 to $700 per ounce), depending on quality.[288] Typical U.S. retail prices were $10–15 per gram (approximately $280–420 per ounce).
  • In 2017, the U.S. was estimated to constitute 90% of the worldwide $9.5 billion legal trade in cannabis.[289]

After some U.S. states legalized cannabis, street prices began to drop. In Colorado, the price of smokable buds (infructescences) dropped 40 percent between 2014 and 2019, from $200 per ounce to $120 per ounce ($7 per gram to $4.19 per gram).[290]

The European Monitoring Centre for Drugs and Drug Addiction reports that typical retail prices in Europe for cannabis varied from €2 to €20 per gram in 2008, with a majority of European countries reporting prices in the range €4–10.[291]

Cannabis as a gateway drug

See also: Gateway drug effect

The gateway hypothesis states that cannabis use increases the probability of trying "harder" drugs. The hypothesis has been hotly debated as it is regarded by some as the primary rationale for the United States prohibition on cannabis use.[292][293] A Pew Research Center poll found that political opposition to marijuana use was significantly associated with concerns about the health effects and whether legalization would increase cannabis use by children.[294]

Some studies state that while there is no proof for the gateway hypothesis,

poly-drug users, and that interventions must address the use of multiple drugs instead of a single hard drug.[297] Almost two-thirds of the poly drug users in the 2009–2010 Scottish Crime and Justice Survey used cannabis.[298]

The gateway effect may appear due to social factors involved in using any illegal drug. Because of the illegal status of cannabis, its consumers are likely to find themselves in situations allowing them to acquaint with individuals using or selling other illegal drugs.[299][300] Studies have shown that alcohol and tobacco may additionally be regarded as gateway drugs;[301] however, a more parsimonious explanation could be that cannabis is simply more readily available (and at an earlier age) than illegal hard drugs[citation needed]. In turn, alcohol and tobacco are typically easier to obtain at an earlier age than is cannabis (though the reverse may be true in some areas), thus leading to the "gateway sequence" in those individuals, since they are most likely to experiment with any drug offered.[292]

A related alternative to the gateway hypothesis is the common liability to addiction (CLA) theory. It states that some individuals are, for various reasons, willing to try multiple recreational substances. The "gateway" drugs are merely those that are (usually) available at an earlier age than the harder drugs. Researchers have noted in an extensive review that it is dangerous to present the sequence of events described in gateway "theory" in causative terms as this hinders both research and intervention.[302]

In 2020, the National Institute on Drug Abuse released a study backing allegations that marijuana is a gateway to harder drugs, though not for the majority of marijuana users.[303] The National Institute on Drug Abuse determined that marijuana use is "likely to precede use of other licit and illicit substances" and that "adults who reported marijuana use during the first wave of the survey were more likely than adults who did not use marijuana to develop an alcohol use disorder within 3 years; people who used marijuana and already had an alcohol use disorder at the outset were at greater risk of their alcohol use disorder worsening. Marijuana use is also linked to other substance use disorders including nicotine addiction."[303] It also reported that "These findings are consistent with the idea of marijuana as a "gateway drug". However, the majority of people who use marijuana do not go on to use other, "harder" substances. Also, cross-sensitization is not unique to marijuana. Alcohol and nicotine also prime the brain for a heightened response to other drugs and are, like marijuana, also typically used before a person progresses to other, more harmful substances."[303]

Research

See also: Medical cannabis research

Research on cannabis is challenging since the plant is illegal in most countries.[304][305][306][307][308] Research-grade samples of the drug are difficult to obtain for research purposes, unless granted under authority of national regulatory agencies, such as the US Food and Drug Administration.[309]

There are also other difficulties in researching the effects of cannabis. Many people who smoke cannabis also smoke tobacco.[310] This causes confounding factors, where questions arise as to whether the tobacco, the cannabis, or both that have caused a cancer. Another difficulty researchers have is in recruiting people who smoke cannabis into studies. Because cannabis is an illegal drug in many countries, people may be reluctant to take part in research, and if they do agree to take part, they may not say how much cannabis they actually smoke.[311]

See also

References

Footnotes

  1. ^ /ˈkænəbɪs/[1]
  2. ^ /ˌmærəˈwɑːnə/[2]
  3. ^ Psychotic episodes are well-documented and typically resolve within minutes or hours, while symptoms may last longer.[46] The use of a single joint can temporarily induce some psychiatric symptoms.[47]
  4. ^ A 2016 review also found a statistically significant increase in crash risk associated with marijuana use, but noted that this risk was "of low to medium magnitude."[53] The increase in risk of motor vehicle crash for cannabis use is between 2 and 3 times relative to baseline, whereas that for comparable doses of alcohol is between 6 and 15 times.[54]
  5. ^ Advocates of legalizing marijuana for recreational use, such as former Illinois state Senator Heather Steans, say that legalizing it would help reduce such hazardous added drugs: "Over 95 percent are buying it on the black market. You don't know what you're buying. It's not a safe product. We've seen it laced with rat poison, fentanyl, all sorts of things. It's funding the cartels and other criminal activity."[161]

Citations

  1. ^ "cannabis noun – Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com". www.oxfordlearnersdictionaries.com. Retrieved 10 November 2022.
  2. ^ "marijuana noun – Definition, pictures, pronunciation and usage notes | Oxford Advanced Learner's Dictionary at OxfordLearnersDictionaries.com". www.oxfordlearnersdictionaries.com. Retrieved 18 April 2019.
  3. PMID 22135433
    .
  4. ^ Rebecca Rivas (2 May 2023). "Why some people believe 'marijuana' is a racist word, and why it doesn't offend me". Missouri Independent.
  5. PMID 26843715
    .
  6. ^ "What is medical marijuana?". National Institute of Drug Abuse. July 2015. Retrieved 19 April 2016. The term medical marijuana refers to using the whole unprocessed marijuana plant or its basic extracts to treat a disease or symptom.
  7. ISBN 978-1-60376-334-9
    .
  8. PMID 26340110
    .
  9. ^
    S2CID 8503107
    .
  10. ^
    PMID 26103030
    .
  11. S2CID 9110606
    .
  12. ^
    PMID 24897085
    .
  13. ^ a b c d e f "Health products containing cannabis or for use with cannabis: Guidance for the Cannabis Act, the Food and Drugs Act, and related regulations". Government of Canada. 11 July 2018. Retrieved 19 October 2018.
  14. ^ Ainge Roy, Eleanor (11 December 2018). "New Zealand passes laws to make medical marijuana widely available". The Guardian. Retrieved 20 January 2019.
  15. ^ Schulz, Chris (30 June 2022). "You can get actual weed from the doctor now". The Spinoff.
  16. ^ "Information on Cannabis Safety". Americans for Safe Access.
  17. ISBN 978-1-315-35059-2
    .
  18. ISBN 978-0-415-30008-7
    .
  19. ^ Curran, H. Valerie; Morgan, Celia J.A. (2014). "Desired and Undesired Effects of Cannabis on the Human Mind and Psychological Well-Being". In Pertwee, Roger G. (ed.). Handbook of Cannabis. Oxford University Press.
  20. S2CID 15918781
    .
  21. ISBN 978-0-7864-8390-7
    .
  22. PMID 16596784
    .
  23. S2CID 31053594
    .
  24. ^ "Medication-Associated Depersonalization Symptoms". Medscape.
  25. PMID 15889607. Archived from the original
    (PDF) on 30 April 2005.
  26. PMID 2178712
    .
  27. doi:10.1590/S1516-89132008000500010
    .
  28. ^
    ISBN 978-0-674-00458-0
    .
  29. ^
    ISBN 978-0-19-515110-7
    .
  30. ISBN 978-1-136-44627-6
    .
  31. ^ "Why Does Cannabis Have to be Heated?". patriotcare.org.
  32. ISBN 978-1-119-96540-4
    .
  33. ISBN 978-1-936807-02-4
    .
  34. ^ "Cannabis and Cannabis Extracts: Greater Than the Sum of Their Parts?" (PDF). Cannabis-med.org. Archived from the original (PDF) on 22 June 2017. Retrieved 7 April 2014.
  35. ^ Dronabinol from PubChem
  36. ISBN 978-0-932551-86-3
    .
  37. ^ "Annual prevalence of use of drugs, by region and globally, 2016". World Drug Report 2018. United Nations Office on Drugs and Crime. 2018. Retrieved 7 July 2018.
  38. ^ "Status and Trend Analysis of Illict [sic] Drug Markets" (PDF). World Drug Report 2015. p. 23. Retrieved 26 June 2015.
  39. ^
    ISBN 978-0199913732
    .
  40. ^ "UNODC Statistics Online". data.unodc.org. Retrieved 9 September 2018.
  41. ^
    S2CID 142795620
    .
  42. ^ "6 facts about marijuana". 22 November 2018. Retrieved 24 September 2020.
  43. ^ "Daily marijuana use among college students highest since 1980". The University Record.
  44. ^ a b McCarthy, Justin (22 July 2015). "More Than Four in 10 Americans Say They Have Tried Marijuana". Gallup.
  45. ^ "For the first time, Americans are smoking more marijuana than cigarettes, poll finds". cbsnews.com.
  46. ^ "Sativex Oral Mucosal Spray Public Assessment Report. Decentralized Procedure" (PDF). United Kingdom Medicines and Healthcare Products Regulatory Agency. p. 93. Retrieved 7 May 2015. There is clear evidence that recreational cannabis can produce a transient toxic psychosis in larger doses or in susceptible individuals, which is said to characteristically resolve within a week or so of absence (Johns 2001). Transient psychotic episodes as a component of acute intoxication are well-documented (Hall et al 1994)
  47. ^ Hunt, Katie (17 March 2020). "Single cannabis joint linked with temporary psychiatric symptoms, review finds". CNN. Retrieved 21 March 2020.
  48. ^
    S2CID 16313727
    .
  49. ISBN 978-0205970742
    .
  50. ^
    PMID 19609589
    .
  51. ^ Abuse, National Institute on Drug. "Does marijuana use affect driving?". www.drugabuse.gov. Retrieved 18 December 2019.
  52. PMID 21976636
    .
  53. PMID 26878835
    .
  54. PMID 25287883
    .
  55. ISBN 978-0-521-80024-2
    .
  56. ^
    ISBN 978-1-118-10605-1
    . Retrieved 14 July 2013.
  57. S2CID 207897219
    .
  58. S2CID 11639790
    .
  59. S2CID 87511682
    .
  60. PMID 37427882
    .
  61. PMID 33568074
    .
  62. S2CID 5903121
    .
  63. S2CID 23749219
    .
  64. ^
    S2CID 207618350
    . Therefore, results indicate evidence for small neurocognitive effects that persist after the period of acute intoxication...As hypothesized, the meta-analysis conducted on studies eval- uating users after at least 25 days of abstention found no residual effects on cognitive performance...These results fail to support the idea that heavy cannabis use may result in long-term, persistent effects on neuropsychological functioning.
  65. S2CID 37826919
    .
  66. PMID 21321675
    . Cannabis appears to continue to exert impairing effects in executive functions even after 3 weeks of abstinence and beyond. While basic attentional and working memory abilities are largely restored, the most enduring and detectable deficits are seen in decision-making, concept formation and planning.
  67. S2CID 9858298
    .
  68. ^
    S2CID 1685727. Archived from the original
    (PDF) on 22 September 2017. Retrieved 27 December 2018.
  69. S2CID 4335379
    .
  70. ^
    S2CID 40707053
    .
  71. PMID 30875650
    . Given that our the central nervous system is an intricately balanced, complex network of billions of neurons and supporting cells, some might imagine that extrinsic substances could cause irreversible brain damage. Our review paints a less gloomy picture of the substances reviewed, however. Following prolonged abstinence, abusers of alcohol (Pfefferbaum et al., 2014) or opiates (Wang et al., 2011) have white matter microstructure that is not significantly different from non-users. There was also no evidence that the white matter microstructural changes observed in longitudinal studies of cannabis, nicotine, or cocaine were completely irreparable. It is therefore possible that, at least to some degree, abstinence can reverse effects of substance abuse on white matter. The ability of white matter to "bounce back" very likely depends on the level and duration of abuse, as well as the substance being abused.
  72. PMID 26756903
    .
  73. S2CID 8245635
    .
  74. ^
    PMID 23390554
    . The most consistently reported brain alteration was reduced hippocampal volume which was shown to persist even after several months of abstinence in one study and also to be related to the amount of cannabis use Other frequently reported morphological brain alterations related to chronic cannabis use were reported in the amygdala the cerebellum and the frontal cortex...These findings may be interpreted as reflecting neuroadaptation, perhaps indicating the recruitment of additional regions as a compensatory mechanism to maintain normal cognitive performance in response to chronic cannabis exposure, particularly within the prefrontal cortex area.
  75. ^
    PMID 27549374
    . 1) The studies reviewed so far demonstrated that chronic cannabis use has been associated with a volume reduction of the hippocampus...3) The overall conclusion arising from these studies is that recent cannabis users may experience subtle neurophysiological deficits while performing on working memory tasks, and that they compensate for these deficits by "working harder" by using additional brain regions to meet the demands of the task.
  76. S2CID 4402954
    . This may reflect the multitude of cognitive tasks employed by the various studies included in these meta-analyses, all of which involved performing a task thereby requiring the participant to reorient their attention and attempt to solve the problem at hand and suggest that greater engagement of this region indicates less efficient cognitive performance in cannabis users in general, irrespective of their age.
  77. PMID 26373473
    .
  78. PMID 29556883
    .
  79. S2CID 24043856
    .
  80. S2CID 31616272
    .
  81. PMID 24402247
    .
  82. S2CID 24160677
    . Epidemiological data indicate a strong relationship between cannabis use and psychosis and schizophrenia beyond transient intoxication with an increased risk of any psychotic outcome in individuals who had ever used cannabis
  83. PMID 26884547
    .
  84. ^
    S2CID 41595474
    .
  85. S2CID 44651274
    .
  86. PMID 21300939
    .
  87. PMID 19783132
    . The contentious issue of whether cannabis use can cause serious psychotic disorders that would not otherwise have occurred cannot be answered based on the existing data
  88. S2CID 36763290
    .
  89. PMID 24884989
    .
  90. PMID 31672337
    .
  91. ^
    PMID 31447137
    .
  92. PMID 30758486
    .
  93. S2CID 29063282
    .
  94. PMID 24402247
    .
  95. ^ Armentano, Paul (5 February 2019). "Marijuana access is associated with decreased use of alcohol, tobacco and other prescription drugs". The Hill.
  96. S2CID 21718690
    .
  97. ^ Rudavsky, Shari. "He loved weed. Then the vomiting began. Months later, he died". USA Today. Retrieved 2 August 2021.
  98. ISBN 978-1-305-17759-8
    .
  99. ^ "Commonly Abused Drugs Charts: Marijuana (Cannabis)". National Institute on Drug Abuse, US National Institutes of Health. 22 July 2019. Retrieved 20 January 2020.
  100. S2CID 23823391
    .
  101. PMID 17296876
    .
  102. PMID 28000146
    .
  103. PMID 16054989
    .
  104. ^ "Does smoking cannabis cause cancer?". Cancer Research UK. 20 September 2010. Archived from the original on 29 July 2012. Retrieved 9 January 2013.
  105. ^ Tashkin, Donald (March 1997). "Effects of marijuana on the lung and its immune defenses". UCLA School of Medicine. Retrieved 23 June 2012.
  106. S2CID 29423964
    .
  107. PMID 25587109
    .
  108. S2CID 20615545
    .
  109. PMID 26560314
    .
  110. PMID 26433192
    .
  111. PMID 26078621
    .
  112. ISBN 978-3-318-02604-7
    .
  113. PMID 29357394
    .
  114. PMID 24176069
    .
  115. S2CID 205566342
    .
  116. S2CID 208019237
    .
  117. S2CID 53286585
    .
  118. PMID 31526057
    .
  119. ^ a b "National Estimates of Drug-Related Emergency Department Visits" (PDF). Drug Abuse Warning Network. U.S. Department of Health and Human Services. 2011. Retrieved 8 May 2015.
  120. PMID 34709212
    .
  121. PMID 26241291
    .
  122. PMID 27048634
    .
  123. ^ "DrugFacts: Marijuana". National Institute on Drug Abuse, US National Institutes of Health. 1 December 2019. Retrieved 20 January 2020.
  124. S2CID 10697253
    .
  125. PMID 27398024
    .
  126. PMID 17245363
    .
  127. S2CID 21573145
    .
  128. PMID 22908200
    .
  129. S2CID 4877869
    .
  130. S2CID 21801428
    .
  131. PMID 21460829
    .
  132. ^
    ISBN 978-0-521-80024-2
    .
  133. PMID 3520605. Archived from the original
    on 15 April 2013. Retrieved 17 February 2011.
  134. ISBN 978-1-136-61493-4
    .
  135. ISBN 9781610691499
    .
  136. ISBN 978-0-9626523-7-0
    .
  137. ISBN 978-1-890883-53-9
    .
  138. ^ "The Non-Specificity of the Duquenois-Levine Field Test for Marijuana". ResearchGate.
  139. PMID 21740689
    .
  140. PMID 23843421
    .
  141. PMID 25101425
    .
  142. ^ Elliott S. "The Ultimate Guide on Indicas vs. Sativas". Herb. Retrieved 22 June 2018.
  143. PMID 28861479
    .
  144. S2CID 3745655
    .
  145. ^ a b c "Why Does Cannabis Potency Matter?". United Nations Office on Drugs and Crime. 29 June 2009.
  146. ^ "Cannabis strength soars over past half century". ScienceDaily. 16 November 2020.
  147. PMID 26903403
    .
  148. S2CID 24350419
    .
  149. ^ Smith D (17 January 2014). "Cannabis and memory loss: dude, where's my CBD?". The Guardian.
  150. ^ "Cannabis Potency". National Cannabis Prevention and Information Centre. Archived from the original on 6 December 2011. Retrieved 13 December 2011.
  151. ^ "BBC: Cannabis laws to be strengthened. May 2008 20:55 UK". BBC News. 7 May 2008. Retrieved 20 September 2010.
  152. PMID 19949195
    .
  153. ^ Hope, Christopher (6 February 2008). "Use of extra strong 'skunk' cannabis soars". The Daily Telegraph. London. Archived from the original on 10 January 2022.
  154. ISBN 978-1-133-17081-5
    .
  155. ^ "Fake Hanf: Ein Drogentrend schwappt in die Schweiz – was du darüber wissen musst". watson.ch (in German).
  156. ^ "Fake Hanf: Tödliches Marihuana hat bereits 61 Menschen getötet". watson.ch (in German).
  157. ^ "Fake Hanf mit synthetischen Cannabinoiden besprüht – drugcom". www.drugcom.de.
  158. ^ "Tödlicher Fake Hanf – Chemisch behandelte Hanfblüten – niemand kann sie erkennen". Schweizer Radio und Fernsehen (SRF) (in German). 14 August 2020.
  159. ^ "Growing Array of Street Drugs Now Laced with Fentanyl", MedPageToday, 17 July 2018
  160. ^ "Is the opioid epidemic now the fentanyl epidemic?" Archived 18 December 2018 at the Wayback Machine, The Baltimore Sun, 7 December 2018
  161. ^ "Medical officials oppose effort to legalize recreational use of marijuana", State Journal-Register, (Springfield, IL), 15 December 2018
  162. ^
    ISBN 978-0-547-35021-9
    .
  163. ISBN 978-1-4094-9438-6
    .
  164. ISBN 978-0-521-80024-2
    .
  165. ISBN 978-92-1-148242-3
    .
  166. ^
    ISBN 978-0-12-800624-5
    .
  167. ISBN 978-0-470-67027-9
    .
  168. ISBN 978-1-4833-2188-2
    .
  169. ^ "Hemp Facts". Naihc.org. Archived from the original on 27 November 2012. Retrieved 9 January 2013.
  170. ISBN 978-0-19-988143-7
    .
  171. ISBN 978-0-932551-52-8
    .
  172. ^ "Kief". Cannabisculture.com. 9 March 2005. Archived from the original on 5 June 2009. Retrieved 2 January 2010.
  173. ISBN 978-1-4521-0824-7
    .
  174. ^ "Hashish". dictionary.reference.com.
  175. ^ Slade, Desmond; Mehmedic, Zlato; Chandra, Suman; ElSohly, Mahmoud (2012). "Is cannabis becoming more potent?". In Castle, David; Murray, Robin M.; Cyril D'Souza, Deepak (eds.). Marijuana and Madness (Second Edition). Cambridge University Press. p. 35.
  176. ISBN 978-1-133-59416-1
    .
  177. ^ Alchimia Blog, Rosin Hash
  178. ISBN 978-1-139-50237-5
    .
  179. ISBN 978-0-85404-178-7
    .
  180. ^ "Dabs – marijuana's explosive secret". Cnbc.com. 24 February 2014. Retrieved 28 February 2014.
  181. ISBN 9789211482409
    .
  182. ^ Alison Hallett for Wired. 20 February 2013 Hash Oil is Blowing Up Across the U.S. – Literally
  183. ISBN 978-0-12-416969-2
    .
  184. ISBN 978-1-4521-0133-0
    .
  185. ISBN 9789563382600
    . Retrieved 17 July 2021.
  186. OCLC 979988717.{{cite book}}: CS1 maint: location missing publisher (link
    )
  187. ^ Stuardo, S. (5 September 2015). "Marihuana prensada: El lado negro de la hierba canábica". BioBioChile (in Spanish). Retrieved 17 June 2021.
  188. ^ Wicht, J. J. (1991). Por un Perú mejor: exposiciones y debates del Primer Programa de Alta Especialización para Parlamentarios (in Spanish). Universidad del Pacífico. Centro de Investigación, Asociación Acción y Pensamiento Democrático (Lima, Peru), Konrad-Adenauer-Stiftung. Internationales Institut. p. 206. Retrieved 17 June 2021.{{cite book}}: CS1 maint: location missing publisher (link)
  189. ISBN 978-1-59259-947-9
    .
  190. ISBN 978-0-914171-51-5
    .
  191. ^ Barber EJ (1992). Prehistoric Textiles: The Development of Cloth in the Neolithic and Bronze Ages with Special Reference to the Aegean. Princeton University Press. p. 17.
  192. ISBN 978-0-691-05887-0
    .
  193. ISBN 978-1440830884
    .
  194. ISBN 978-0-349-11127-8
    .
  195. ISBN 978-0-929349-03-9
    .
  196. ISBN 978-3-593-37442-0
    .
  197. ISBN 978-0-19-285441-4
    .
  198. ISBN 978-0-307-24362-1
    .
  199. ^ Staelens, Stefanie (10 March 2015). "The Bhang Lassi Is How Hindus Drink Themselves High for Shiva". Vice.com. Retrieved 10 August 2017.
  200. ISBN 978-81-312-1129-8.See also article on Marijuana as a word
    .
  201. ISBN 978-0-19-920687-2
  202. PMID 31206023
    .
  203. ^ Donahue, Michelle (12 June 2019). "Earliest evidence for cannabis smoking discovered in ancient tombs". National Geographic. Archived from the original on 13 June 2019.
  204. ^ Walton RP (1938). Marijuana, America's New Drug Problem. JB Lippincott. p. 6.
  205. ISBN 978-2-84161-174-4
    .
  206. ISBN 978-3-11-081206-0
    . Cannabis Smoking in 13th-14th Century Ethiopia: Chemical Evidence
  207. ^ Booth, Martin (2004). Cannabis: A History. Picador. p. 38.
  208. ^ David E. Newton (2017). Marijuana: A Reference Handbook, 2nd Edition. p. 325.
  209. ^ Eileen Konieczny, Lauren Wilson (2018). Healing with CBD.
  210. ^ Pilkington, Mark (27 July 2005). "Clouds of smoke". The Guardian. Retrieved 10 November 2022.
  211. ISBN 978-0-19-988693-7
    .
  212. ^ A Collection of the Laws of Mauritius and Its Dependencies. By the authority of the Government. 1867. pp. 541–.
  213. ISBN 978-90-5782-042-7
    .
  214. ^ "Statement of Dr. William C. Woodward". Drug library. Retrieved 20 September 2010. The District of Columbia law, insofar as it relates to Cannabis, is a part of an act passed by Congress in 1906 entitled "An act to regulate the practice of pharmacy and the sale of poisons in the District of Columbia, and for other purposes", approved May 17, 1906, and originally published as 34 Statutes, 175, which is now to be found in the District Code, section 191 and following. It limits the sale of Cannabis, its derivatives and its preparations to pharmacists and persons who are authorized assistants to pharmacists.
  215. ^ The Opium and Narcotic Drug Act, 1923, S.C. 1923, c. 22
  216. ^ Willoughby WW (1925). "Opium as an international problem". Baltimore: The Johns Hopkins Press. Retrieved 20 September 2010.
  217. ^ Opium as an international problem: the Geneva conferences – Westel Woodbury Willoughby at Google Books
  218. Pub. L.Tooltip Public Law (United States) 75–238, 50 Stat. 551
    , enacted August 2, 1937
  219. ISBN 978-0-312-42494-7
    .
  220. ISBN 978-0-226-34102-6
    .
  221. ^ Use drop-down menu on site to view Netherlands entry.), Eldd.emcdda.europa.eu, archived from the original on 7 May 2010, retrieved 17 February 2011
  222. ^ Drugs Policy in the Netherlands, Ukcia.org, archived from the original on 2 August 2017, retrieved 17 February 2011
  223. ^ "Amsterdam Will Ban Tourists from Pot Coffee Shops". Atlantic Wire. 27 May 2011. Archived from the original on 28 May 2011. Retrieved 23 June 2011.
  224. ^ Dockterman E (29 June 2012). "Marijuana Now the Most Popular Drug in the World". Time NewsFeed. Time Inc. Retrieved 16 March 2013.
  225. ^ "Factsheet". World Drug Report 2017. United Nation Office on Drugs and Crime (UNODC).
  226. S2CID 192201145
    .
  227. ^ Rubin, 1975. p. 1
  228. ^ a b Rubin, 1975. p. 3
  229. ^ a b Rubin, 1975. p. 4
  230. ISBN 978-0-7619-2258-2
    .
  231. ^ "Many Dutch coffee shops close as liberal policies change, Exaptica". Expatica.com. 27 November 2007. Archived from the original on 29 April 2011. Retrieved 20 September 2010.
  232. ^ "43 Amsterdam coffee shops to close door", Radio Netherlands, Friday 21 November 2008 Archived 2 December 2008 at the Wayback Machine
  233. ^ O'Sullivan F (3 March 2014). "Why the Mayor of Copenhagen Wants to Get Into the Marijuana Business". Bloomberg.com. Retrieved 23 January 2018.
  234. ^ Johnston I (5 January 2014). "As cannabis is widely legalised, China cashes in on an unprecedented boom". Independent. Retrieved 23 January 2018.
  235. ^ Liljas P (3 June 2017). "Could Thailand, which gave world the bong, legalise cannabis for medicinal use? After failed war on drugs, attitudes have softened". Post Magazine. Retrieved 23 January 2018.
  236. ^ "Marijuana goes legal in Washington state amid mixed messages". Reuters. 7 December 2012. Archived from the original on 24 September 2015. Retrieved 14 December 2012.
  237. ^ Duke A (8 November 2012). "2 states legalize pot, but don't 'break out the Cheetos' yet". CNN.com. Retrieved 2 January 2013.
  238. ^ "Marijuana clubs ring in new year in Colorado as legalized pot smoking begins". Abcnews.go.com. 1 January 2013. Retrieved 2 January 2013.
  239. ^ Mintz H (6 May 2013). "Medical pot: California Supreme Court allows cities to ban weed dispensaries". Marin Independent Journal. Archived from the original on 2 November 2013.
  240. ^ Baker V (11 December 2013). "Marijuana laws around the world: what you need to know". The Guardian.
  241. ^ Castaldi, Malena (19 July 2017). "Uruguay pharmacies start selling cannabis straight to consumers". Reuters. Montevideo.
  242. ^ Scotti, Monique (20 June 2018). "Marijuana to be legal in Canada starting October 17, Trudeau confirms".
  243. ^ Sapra, Bani (20 June 2018). "Canada becomes second nation in the world to legalize marijuana". CNN.
  244. ^ "Uttarakhand To Become First Indian State To Legalise Cannabis Cultivation". Indiatimes. 27 November 2015. Retrieved 12 March 2017.
  245. ^ a b "South Asia Regional Profile Report" (PDF). UNODC.
  246. ^ Alchimia Blog, Medical marijuana news, December 2015
  247. ^ a b Butler, Patrick (17 October 2018). "Cannabis is legal in Canada – here's what you need to know". CBC. Retrieved 1 November 2018.
  248. ^ Sapra, Bani (20 June 2018). "Canada becomes second nation in the world to legalize marijuana". CNN. Retrieved 1 November 2018.
  249. ^ "Cannabis Act (S.C. 2018, c. 16)". Justice Canada. Government of Canada. Archived from the original on 25 March 2022. Retrieved 24 November 2018.
  250. ^ "This Application Seems Rigorous. Are All These Hoops Necessary?". LicensedProducersCanada.com. 5 July 2018. Retrieved 1 November 2018.
  251. ^ "Will Craft Cannabis Growers in Canada Succeed Like Craft Brewers?". LicensedProducersCanada.com. October 2018. Retrieved 1 November 2018.
  252. ^ Parliament of the Czech Republic (1998), Explanatory Report to Act No. 112/1998 Coll., which amends the Act No. 140/1961 Coll., the Criminal Code, and the Act No. 200/1990 Coll., on misdemeanors (in Czech), Prague{{citation}}: CS1 maint: location missing publisher (link) "Podle čl. 36 Jednotné úmluvy o omamných látkách ze dne 31. března 1961 (č. 47/1965 Sb.) se signatáři zavazují k trestnímu postihu tam uvedených forem nakládání s drogami včetně jejich držby. Návrh upouští od dosavadní beztrestnosti držby omamných a psychotropních látek a jedů pro svoji potřebu. Dosavadní beztrestnost totiž eliminuje v řadě případů možnost postihu dealerů a distributorů drog."
  253. ^ Castaneda JG (31 March 2012). "The summit of muted intentions". aljazeera.com.
  254. ^ "Congreso aprobó, en último debate, uso medicinal de la marihuana". 25 May 2016.
  255. ^ "Dosis máximas de droga para consumo ya están vigentes" Archived 24 June 2013 at the Wayback Machine at El Comercio.com.
  256. ^ "Ecuador: Aprueban tenencia de drogas para consumo" Archived 25 June 2013 at the Wayback Machine at El Nuevo Herald
  257. ^ "Ecuador could regulate the drug industry". Archived from the original on 24 June 2013.
  258. ^ "Drug policy profiles – Portugal" (PDF). 1 June 2011. Retrieved 5 February 2017.
  259. ^ Lindeque, Mia. "Dagga users celebrate following ConCourt ruling on private use". Retrieved 3 November 2018.
  260. ^ Williams, Sean (28 April 2019). "Mexico Aims to Legalize Recreational Marijuana Before October". The Motley Fool. Retrieved 29 April 2019.
  261. ^ Ley de Narcomenudeo Archived 30 November 2010 at the Wayback Machine, El Pensador (in Spanish), 17 October 2009
  262. ^ Mexico: The Law Against Small-Scale Drug Dealing. A Doubtful Venture, Jorge Hernández Tinajero & Carlos Zamudio Angles, Series on Legislative Reform of Drug Policies Nr. 3, November 2009
  263. ^ "Germany becomes largest EU country to legalize cannabis for recreational use". Le Monde.fr. 1 April 2024. Retrieved 19 April 2024.
  264. ^ Ross, Selena (6 June 2018). "All eyes on Canada as first G7 nation prepares to make marijuana legal". The Guardian. Retrieved 10 July 2018.
  265. ^ Sapra, Bani (20 June 2018). "Canada becomes second nation in the world to legalize marijuana". CNN.
  266. ^ "Marijuana Overview". National Conference of State Legislatures. Retrieved 29 August 2019.
  267. ^ Smith, Tasha (5 June 2018). ""New Amsterdam" No More? Spain's Cannabis Clubs Fight to Stay Open". Merry Jane. Retrieved 23 August 2018.
  268. ^ Haines, Gavin (21 February 2017). "Everything you need to know about marijuana smoking in the Netherlands". The Telegraph. Archived from the original on 10 January 2022. Retrieved 22 July 2018.
  269. ^ "The Legal Situation of Cannabis in the Netherlands". 20 May 2020. Archived from the original on 18 June 2020. Retrieved 2 June 2020.
  270. ^ Bubola, Emma (15 December 2021). "Malta Becomes First E.U. Country to Legalize Marijuana". The New York Times. Archived from the original on 28 December 2021.
  271. ^ Massa, Silja (29 June 2019). "Kevytkannabis saapui Viroon – Suomalaisturistin ei kannata ostaa tuliaisiksi Virossa laillisia tuotteita". Yle (in Finnish). Retrieved 25 September 2022.
  272. ^ "Lebanon legalizes cannabis farming for medicinal use". Reuters. 21 April 2020.
  273. ^ "Is Weed Legal in Japan? And Other Vacation Info for Cannabis Users". 6 February 2020.
  274. ^ "Here are the absolute worst places on earth to be caught with weed". thegrowthop.
  275. TheGuardian.com
    . 23 October 2018.
  276. ^ "World Drug Report 2006". United Nations Office on Drugs and Crime. Ch. 2.3.
  277. ^ a b c Turco, Bucky (25 September 2017). "Why is Weed Getting More Potent". Gizmodo.
  278. ^ Forbes D (19 November 2002). "The Myth of Potent Pot". Slate.com.
  279. ^ a b c d e f United Nations. "World Drug Report 2013" (PDF). United Nations Office on Drugs and Crime. Retrieved 13 December 2014.
  280. ^ "Medical Use of Marijuana". Health Canada. Retrieved 12 January 2015.
  281. ^ "New Colombia Resources Inc Subsidiary, Sannabis, Produces First Batch of Medical Marijuana Based Products in Colombia to Fill Back Orders". prnewswire.com (Press release). PR Newswire. Retrieved 12 January 2015.
  282. ^ Moussaoui R (25 November 2013). "Lebanon cannabis trade thrives in shadow of Syrian war". AFP.
  283. ^ a b Garelli SL (25 November 2008). "Mexico, Paraguay top pot producers, U.N. report says". CNN International. Retrieved 28 September 2013.
  284. ^ Jackman, Robert (12 January 2019). "How Britain became the world's largest exporter of medical marijuana". The Spectator. Retrieved 27 December 2019.
  285. ^ "Cannabis: Wholesale, street prices and purity levels" (PDF). UNODC.org. 2005. Retrieved 9 January 2013.
  286. ^ "Report on U.S. Domestic Marijuana Production". NORML. Archived from the original on 26 December 2009. Retrieved 2 January 2010.
  287. ^ "Marijuana Called Top U.S. Cash Crop". 2008 ABCNews Internet Ventures. 20 December 2006.
  288. ISBN 978-92-1-148229-4
    .
  289. ^ Sharma, Rakesh (25 June 2019). "How Federal Legalization Could Transform The US Cannabis Market". Investopedia. Retrieved 24 July 2019.
  290. ^ Hughes, Trevor (23 May 2019). "As marijuana prices drop, growers push 'organic' cannabis – with a higher price tag". USA Today. Retrieved 24 July 2019.
  291. ISBN 978-92-9168-324-6. Archived from the original
    (PDF) on 25 April 2013. Retrieved 1 July 2009.
  292. ^ a b "RAND study casts doubt on claims that marijuana acts as a "gateway" to the use of cocaine and heroin". RAND Corporation. 2 December 2002. Archived from the original on 4 November 2006.
  293. ISBN 978-0-7890-3840-1
    .
  294. ^ "Public Views of Marijuana – Legalization, Decriminalization, Concerns | Pew Research Center for the People and the Press". 2 April 2014.
  295. ISBN 978-0-7619-3007-5
    .
  296. ^ Saitz R (18 February 2003). "Is marijuana a gateway drug?". Journal Watch. 2003 (218): 1. Archived from the original on 10 July 2003.
  297. PMID 17624977
    .
  298. ^ "3 The Experience of Drug Users". 2009/10 Scottish Crime and Justice Survey: Drug Use. The Scottish Government. 21 January 2011. Retrieved 5 November 2013.
  299. S2CID 2833456
    .
  300. ^ "Marijuana Policy Project – FAQ". Archived from the original on 22 June 2008.
  301. PMID 8246462
    .
  302. PMID 22261179
    .
  303. ^ a b c "Marijuana Research Report:Is marijuana a gateway drug?". National Institute on Drug Abuse. July 2020. Retrieved 7 November 2020.
  304. ^ "Marijuana Research: Current restrictions on marijuana research are absurd". Scientific American. 22 November 2004. Archived from the original on 7 November 2010. Retrieved 15 January 2013.
  305. PMID 16627464
    .
  306. ^ Jha A (31 May 2012). "Ecstasy and cannabis should be freely available for study, says David Nutt". The Guardian. Retrieved 15 January 2013.
  307. ^ "Medical Marijuana Policy in the United States". Stanford.edu. 15 May 2012. Retrieved 15 January 2013.
  308. ^ Conaboy C (19 October 2012). "Research into marijuana's medical benefits limited; scientists cite challenge of studying an illegal drug". Boston Globe. Archived from the original on 21 October 2012. Retrieved 15 January 2013.
  309. ^ "FDA and Cannabis: Research and Drug Approval Process". US Food and Drug Administration. 14 January 2020. Retrieved 21 January 2020.
  310. PMID 22340422
    .
  311. ^ "Does smoking cannabis cause cancer?". Cancer Research UK (CRUK). 30 August 2017. Archived from the original on 19 December 2013. Retrieved 26 December 2013.

External links

Look up Appendix:Cannabis slang in Wiktionary, the free dictionary.
  • Media related to Cannabis at Wikimedia Commons
  • The dictionary definition of marijuana at Wiktionary