Heroin


Heroin
Heroin
Systematic (IUPAC) name
(5α,6α)-7,8-didehydro-4,5-epoxy-17-methylmorphinan-3,6-diol diacetate
Clinical data
AHFS/Drugs.com entry
Pregnancy cat. Not yet classified, but studies have shown a risk of abnormalities, hepatitis, malnutrition, and many other effects.[1]
Legal status Prohibited (S9) (AU) Schedule I (CA) ? (UK) Schedule I (US)
Dependence liability High
Routes Inhalation, Transmucosal, Intravenous, Oral, Intranasal, Rectal, Intramuscular
Pharmacokinetic data
Bioavailability <35% (oral), 44–61% (inhaled)[2]
Protein binding 0% (morphine metabolite 35%)
Metabolism hepatic
Half-life <10 minutes [3]
Excretion 90% renal as glucuronides, rest biliary
Identifiers
CAS number 561-27-3 YesY
ATC code N02AA09
PubChem CID 5462328
DrugBank DB01452
ChemSpider 4575379 YesY
UNII 8H672SHT8E YesY
ChEBI CHEBI:27808 YesY
ChEMBL CHEMBL459324 YesY
Synonyms Diamorphine, Diacetylmorphine, Acetomorphine, (Dual) Acetylated morphine, Morphine diacetate
Chemical data
Formula C21H23NO5 
Mol. mass 369.41 g/mol
SMILES eMolecules & PubChem
 YesY(what is this?)  (verify)

Heroin (diacetylmorphine (INN)), also known as diamorphine (BAN), or, especially in older literature, as morphine diacetate, is an opioid analgesic synthesized from morphine, a derivative of the opium poppy. When used in medicine it is typically used to treat severe pain, such as that resulting from a heart attack. It is the 3,6-diacetyl ester of morphine, and functions as a morphine prodrug (meaning that it is metabolically converted to morphine inside the body).[4] The white crystalline form considered "pure heroin" is usually the hydrochloride salt, diacetylmorphine hydrochloride. When heroin is supplied illegally, though, it is often adulterated to a freebase form, dulling the sheen and consistency to a matte white powder.[5] As of 2004, roughly 87% of the world supply of opium and its derivatives, including heroin, was thought to be produced in Afghanistan.[6]

As with other opioids, diacetylmorphine is used as both an analgesic and a recreational drug. Frequent and regular administration is associated with tolerance and physical dependence, which may develop into addiction. Internationally, diacetylmorphine is controlled under Schedules I and IV of the Single Convention on Narcotic Drugs.[7] It is illegal to manufacture, possess, or sell diacetylmorphine without a license in almost every country.

Under the chemical names diamorphine and diacetylmorphine, heroin is a legally prescribed controlled drug in the United Kingdom, and is supplied in tablet or injectable form for the same indications as morphine is, often being preferred over morphine due to its lower side effect profile. It is also available for prescription to long-term users in the Netherlands, United Kingdom, Switzerland, Germany and Denmark alongside psycho-social care,[8][9] and a similar programme is being campaigned for by liberal political parties in Norway.

Contents

Usage

Long-term effects of intravenous usage, including - and indeed primarily because of - the effects of the contaminants common in illegal heroin and contaminated needles.[10]
Short-term effects of usage[10]

The BBC reported that "Worldwide, the UN estimates there are more than 50 million regular users of heroin, cocaine and synthetic drugs."[11] Global users of diacetylmorphine are estimated at between 15.16 million and 21.13 million people aged 15–64.[12]

Medical use

Under the chemical name diamorphine, diacetylmorphine is prescribed as a strong analgesic in the United Kingdom, where it is given via subcutaneous, intramuscular, intrathecal or intravenous route. Its use includes treatment for acute pain, such as in severe physical trauma, myocardial infarction, post-surgical pain, and chronic pain, including end-stage cancer and other terminal illnesses. In other countries it is more common to use morphine or other strong opioids in these situations. In 2004, the National Institute for Health and Clinical Excellence produced guidance on the management of caesarian section which recommended the use of intrathecal or epidural diacetylmorphine for post-operative pain relief.[13]

In 2005, there was a shortage of diacetylmorphine in the UK, because of a problem at the main UK manufacturers.[14] Because of this, many hospitals changed to using morphine instead of diacetylmorphine. Although there is no longer a problem with the manufacturing of diacetylmorphine in the UK, some hospitals there have continued to use morphine (the majority, however, continue to use diacetylmorphine, and diacetylmorphine tablets are supplied for pain management).

Diacetylmorphine continues to be widely used in palliative care in the United Kingdom, where it is commonly given by the subcutaneous route, often via a syringe driver, if patients cannot easily swallow oral morphine solution. The advantage of diacetylmorphine over morphine is that diacetylmorphine is more fat soluble and therefore more potent (by injection only), so smaller doses of it are needed for the same analgesic effect. Both of these factors are advantageous if giving high doses of opioids via the subcutaneous route, which is often necessary in palliative care.

The medical use of diacetylmorphine (in common with other strong opioids such as morphine, fentanyl and oxycodone) is controlled in the United Kingdom by the Misuse of Drugs Act 1971. In the UK, it is a class A controlled drug. Registers of its use are required to be kept in hospitals.

Diacetylmorphine is also used as a maintenance drug to treat addicts. Though this is somewhat controversial among proponents of a zero tolerance drug policy, it has proven superior to methadone in improving the social and health situation of addicts.[15] See: Heroin prescription for addicts

Recreational use

Diacetylmorphine, in non-medical settings called heroin, is used as a recreational drug for the transcendent relaxation and intense euphoria it induces. Anthropologist Michael Agar once described heroin as "the perfect whatever drug."[16] Tolerance quickly develops, and users need more of the drug to achieve the same effects. Its popularity with recreational drug users, compared to morphine, reportedly stems from its perceived different effects.[17] In particular, users report an intense rush, an acute transcendent state of euphoria, that occurs while diacetylmorphine is being metabolized into 6-monoacetylmorphine (6-MAM) and morphine in the brain. Heroin produces more euphoria than other opioids upon injection. One possible explanation is the presence of 6-monoacetylmorphine, a metabolite unique to heroin. While other opioids of recreational use, such as codeine, produce only morphine, heroin also leaves 6-MAM, also a psycho-active metabolite. However, this perception is not supported by the results of clinical studies comparing the physiological and subjective effects of injected heroin and morphine in individuals formerly addicted to opioids; these subjects showed no preference for one drug over the other. Equipotent injected doses had comparable action courses, with no difference in subjects' self-rated feelings of euphoria, ambition, nervousness, relaxation, drowsiness, or sleepiness.[18]

Short-term addiction studies by the same researchers demonstrated that tolerance developed at a similar rate to both heroin and morphine. When compared to the opioids hydromorphone, fentanyl, oxycodone, and pethidine/meperidine, former addicts showed a strong preference for heroin and morphine, suggesting that heroin and morphine are particularly susceptible to abuse and addiction. Morphine and heroin were also much more likely to produce euphoria and other positive subjective effects when compared to these other opioids.[18]

Some researchers have attempted to explain heroin use and the culture that surrounds it through the use of sociological theories. In Righteous Dopefiend, Philippe Bourgois and Jeff Schonberg use anomie theory to explain why people begin using heroin. By analyzing a community in San Francisco, they demonstrated that heroin use was caused in part due to internal and external factors such as violent homes and parental neglect. This lack of emotional, social, and financial support causes strain and influences individuals to engage in deviant acts, including heroin usage.[19] They further found that heroin users practiced "retreatism", a behavior first described by Howard Abadinsky, in which those who suffer from such strain reject society's goals and institutionalized means of achieving them.[20]

Prescription for addicts

The UK Department of Health's Rolleston Committee Report[21] in 1926 established the British approach to diacetylmorphine prescription to users, which was maintained for the next 40 years: dealers were prosecuted, but doctors could prescribe diacetylmorphine to users when withdrawing from it would cause harm or severe distress to the patient. This "policing and prescribing" policy effectively controlled the perceived diacetylmorphine problem in the UK until 1959 when the number of diacetylmorphine addicts doubled every 16th month during a period of ten years, 1959–1968.[22] In 1964 the Brain Committee recommended that only selected approved doctors working at approved specialised centres be allowed to prescribe diacetylmorphine and benzoylmethylecgonine (cocaine) to users. The law was made more restrictive in 1968. Beginning in the 1970s, the emphasis shifted to abstinence and the use of methadone, until now only a small number of users in the UK are prescribed diacetylmorphine.[23]

In 1994 Switzerland began a trial diacetylmorphine maintenance program for users that had failed multiple withdrawal programs. The aim of this program is to maintain the health of the user to avoid medical problems stemming from the illicit use of diacetylmorphine. Reducing drug-related crime and preventing overdoses were two other goals. The first trial in 1994 involved 340 users, although enrollment was later expanded to 1000 based on the apparent success of the program. Participants are allowed to inject diacetylmorphine in specially designed pharmacies for 15 Swiss francs per day.[24] A national referendum in November 2008 showed 68% of voters supported the plan,[25] introducing diacetylmorphine prescription into federal law. The trials before were based on time-limited executive ordinances.

The success of the Swiss trials led German, Dutch,[26] and Canadian[27] cities to try out their own diacetylmorphine prescription programs.[28] Some Australian cities (such as Sydney) have instituted legal diacetylmorphine supervised injecting centers, in line with other wider harm minimization programs.

Since January 2009 Denmark has prescribed diacetylmorphine to a few addicts that have tried methadone and subutex without success.[29] Beginning in February 2010, addicts in Copenhagen and Odense will be eligible to receive free diacetylmorphine. Later in 2010 other cities including Århus and Esbjerg will join the scheme. In total, around 230 addicts will be able to receive free diacetylmorphine.[30] However, Danish addicts will only be able to inject heroin according to the policy set by Danish National Board of Health.[31] Of the estimated 1500 drug users who do not benefit from the current oral substitution treatment, approximately 900 will not be in the target group for treatment with injectable diacetylmorphine, either because of "massive multiple drug abuse of non-opioids" or "not wanting treatment with injectable diacetylmorphine".[32]

In July 2009, the German Bundestag passed a law allowing diacetylmorphine prescription as a standard treatment for addicts; while diacetylmorphine prescription was started in 2002, it was only authorized as a large-scale trial.[33]

Detection in biological fluids

The major metabolites of diacetylmorphine, 6-MAM, morphine, morphine-3-glucuronide and morphine-6-glucuronide, may be quantitated in blood, plasma or urine to monitor for abuse, confirm a diagnosis of poisoning or assist in a medicolegal death investigation. Most commercial opiate screening tests cross-react appreciably with these metabolites, as well as with other biotransformation products likely to be present following usage of street-grade diacetylmorphine such as 6-acetylcodeine and codeine. However, chromatographic techniques can easily distinguish and measure each of these substances. When interpreting the results of a test, it is important to consider the diacetylmorphine usage history of the individual, since a chronic user can develop tolerance to doses that would incapacitate an opiate-naive individual, and the chronic user often has high baseline values of these metabolites in his system. Furthermore, some testing procedures employ a hydrolysis step prior to quantitation that converts many of the metabolic products to morphine, yielding a result that may be many times larger than with a method that examines each product individually.[34]

Adverse effects

Like most opioids, unadulterated heroin doesn't cause many long-term complications other than dependence and constipation.[35] Adulterated "street" heroin however is considered to be one of the most harmful drugs especially if consumed intravenously.

  • Intravenous use of heroin (and any other substance) with non-sterile needles and syringes or other related equipment may lead to:
    • The risk of contracting blood-borne pathogens such as HIV and hepatitis
    • The risk of contracting bacterial or fungal endocarditis and possibly venous sclerosis
    • Abscesses
  • Poisoning from contaminants added to "cut" or dilute heroin
  • Chronic constipation
  • Addiction
  • Tolerance
  • Physical dependence can result from prolonged use of all opioids, resulting in withdrawal symptoms on cessation of use
  • Decreased kidney function (although it is not currently known if this is because of adulterants or infectious diseases)[36]

Many countries and local governments have begun funding programs that supply sterile needles to people who inject illegal drugs in an attempt to reduce these contingent risks and especially the contraction and spread of blood-borne diseases. The Drug Policy Alliance reports that up to 75% of new AIDS cases among women and children are directly or indirectly a consequence of drug use by injection. The United States federal government does not operate needle exchanges, although some state and local governments do support needle exchange programs.

Anthropologists Philippe Bourgois and Jeff Schonberg, who did a decade of field work among homeless heroin and cocaine addicts in San Francisco, reported that the African-American addicts they observed were more inclined to "direct deposit" heroin into a vein, rather than "skin-popping" their injections. (Skin-popping was a far more widespread practice among the white addicts: "By the midpoint of our fieldwork, most of the whites had given up searching for operable veins and skin-popped. They sank their needles perfunctorily, often through their clothing, into their fatty tissue.") Bourgois and Schonberg describes how the cultural difference between the African-Americans and the whites leads to this contrasting behavior, and also points out that the two different ways to inject heroin comes with different health risks. Skin-popping more often results in abscesses, and direct injection more often leads to fatal overdose and also to hepatitis C and HIV infection.[19]

Heroin overdose is usually treated with an opioid antagonist,[citation needed] such as naloxone (Narcan), or naltrexone, which has high affinity for opioid receptors but does not activate them. This reverses the effects of heroin and other opioid agonists and causes an immediate return of consciousness but may precipitate withdrawal symptoms. The half-life of naloxone is much shorter than that of most opioid agonists, so that antagonist typically has to be administered multiple times until the opioid has been metabolized by the body.

Depending on drug interactions and numerous other factors, death from overdose can take anywhere from several minutes to several hours because of anoxia resulting from the breathing reflex being suppressed by µ-opioids. An overdose is immediately reversible with an opioid antagonist injection. Diacetylmorphine overdoses can occur because of an unexpected increase in the dose or purity or because of diminished opioid tolerance. However, many fatalities reported as overdoses are probably caused by interactions with other depressant drugs like alcohol or benzodiazepines.[37] It should also be noted that since heroin can cause nausea and vomiting, a significant number of deaths attributed to heroin overdose are caused by aspiration of vomit by an unconscious victim. Some sources quote the median lethal dose (for an average 75 kg opiate-naive individual) as being between 75 and 375 mg.[38] Illicit heroin is of widely varying and unpredictable purity. This means that the user may prepare what they consider to be a moderate dose while actually taking far more than intended. Also, tolerance typically decreases after a period of abstinence. If this occurs and the user takes a dose comparable to their previous use, the user may experience drug effects that are much greater than expected, potentially resulting in a dangerous overdose.

It has been speculated that an unknown portion of heroin related deaths are the result of an overdose or allergic reaction to quinine, which may sometimes be used as a cutting agent.[39]

A final factor contributing to overdoses is place conditioning. Diacetylmorphine use is a highly ritualized behavior. While the mechanism has yet to be clearly elucidated, longtime heroin users display increased tolerance to the drug in locations where they have repeatedly administered. When the user injects in a different location, this environment-conditioned tolerance does not occur, resulting in a greater drug effect. The user's typical dose of the drug, in the face of decreased tolerance, becomes far too high and can be toxic, leading to overdose.[40]

A small percentage of heroin smokers, and occasionally IV users, may develop symptoms of toxic leukoencephalopathy. The cause has yet to be identified, but one speculation is that the disorder is caused by an uncommon adulterant that is only active when heated.[41][42][43] Symptoms include slurred speech and difficulty walking.

Cocaine is sometimes used in combination with heroin, and is referred to as a speedball when injected or moonrocks when smoked together. Cocaine acts as a stimulant, whereas heroin acts as a depressant. Coadministration provides an intense rush of euphoria with a high that combines both effects of the drugs, while excluding the negative effects, such as anxiety and sedation. The effects of cocaine wear off far more quickly than heroin, thus if an overdose of heroin was used to compensate for cocaine, the end result is fatal respiratory depression.[citation needed]

Withdrawal

The withdrawal syndrome from heroin (the so-called cold turkey) may begin within 6 to 24 hours of discontinuation of the drug; however, this time frame can fluctuate with the degree of tolerance as well as the amount of the last consumed dose. Symptoms may include: sweating, malaise, anxiety, depression, akathisia, priapism, extra sensitivity of the genitals in females, general feeling of heaviness, cramp-like pains in the limbs, excessive yawning or sneezing, tears, rhinorrhea, sleep difficulties (insomnia), cold sweats, chills, severe muscle and bone aches; nausea and vomiting, diarrhea, cramps, and fever.[44]

Pharmacology

When taken orally, heroin undergoes extensive first-pass metabolism via deacetylation, making it a prodrug for the systemic delivery of morphine.[4] When the drug is injected, however, it avoids this first-pass effect, very rapidly crossing the blood-brain barrier because of the presence of the acetyl groups, which render it much more fat soluble than morphine itself.[45] Once in the brain, it then is deacetylated variously into the inactive 3-monoacetylmorphine and the active 6-monoacetylmorphine (6-MAM), and then to morphine which bind to μ-opioid receptors, resulting in the drug's euphoric, analgesic (pain relief), and anxiolytic (anti-anxiety) effects; heroin itself exhibits relatively low affinity for the μ receptor.[46] Unlike hydromorphone and oxymorphone, however, administered intravenously, heroin creates a larger histamine release, similar to morphine, resulting in the feeling of a greater subjective "body high" to some, but also instances of pruritus (itching) when they first start using.[47]

Both morphine and 6-MAM are μ-opioid agonists which bind to receptors present throughout the brain, spinal cord and gut of all mammals. The μ-opioid receptor also binds endogenous opioid peptides such as β-endorphin, Leu-enkephalin, and Met-enkephalin. Repeated use of heroin results in a number of physiological changes, including decreases in the number of μ-opioid receptors.[citation needed] These physiological alterations lead to tolerance and dependence, so that cessation of heroin use results in a set of remarkably uncomfortable symptoms including pain, anxiety, muscle spasms, and insomnia called the opioid withdrawal syndrome. Depending on usage it has an onset four to 24 hours after the last dose of heroin. Morphine also binds to δ- and κ-opioid receptors.

There is also evidence that 6-MAM binds to a subtype of μ-opioid receptors which are also activated by the morphine metabolite morphine-6β-glucuronide but not morphine itself.[48] The third substype of third opioid type (mu-3) receptor. Which may be a commonality to other six position monoesters of morphine. The contribution of these receptors to the overall pharmacology of heroin remains unknown.

A subclass of morphine derivatives, namely the 3,6 esters of morphine, with similar effects and uses includes the clinically used strong analgesics nicomorphine (Vilan), and dipropanoylmorphine; there is also the latter's dihydromorphine analogue, diacetyldihydromorphine (Paralaudin). Two other 3,6 diesters of morphine invented in 1874-5 along with diacetylmorphine, dibenzoylmorphine and acetylpropionylmorphine, were made as substitutes after it was outlawed in 1925 and therefore sold as the first "designer drugs" until they were outlawed by the League of Nations in 1930.

Etymology

In 1895, the German drug company Bayer marketed diacetylmorphine as an over the counter drug under the trademark name Heroin.[49] The name was derived from the Greek word "Heros" because of its perceived "heroic" effects upon a user.[49] It was chiefly developed as a morphine substitute for cough suppressants that did not have morphine's addictive side-effects. Morphine at the time was a popular recreational drug, and Bayer wished to find a similar but non-addictive substitute to market.[50] However, contrary to Bayer's advertising as a "non-addictive morphine substitute," heroin would soon have one of the highest rates of dependence amongst its users.[51]

Synthesis of heroin from opium

History

Bayer Heroin bottle

The opium poppy was cultivated in lower Mesopotamia as long ago as 3400 BCE.[52] The chemical analysis of opium in the 19th century revealed that most of its activity could be ascribed to two alkaloids, codeine and morphine.

Diacetylmorphine was first synthesized in 1874 by C. R. Alder Wright, an English chemist working at St. Mary's Hospital Medical School in London. He had been experimenting with combining morphine with various acids. He boiled anhydrous morphine alkaloid with acetic anhydride for several hours and produced a more potent, acetylated form of morphine, now called diacetylmorphine or morphine diacetate. The compound was sent to F. M. Pierce of Owens College in Manchester for analysis. Pierce told Wright:

Doses ... were subcutaneously injected into young dogs and rabbits ... with the following general results ... great prostration, fear, and sleepiness speedily following the administration, the eyes being sensitive, and pupils constrict, considerable salivation being produced in dogs, and slight tendency to vomiting in some cases, but no actual emesis. Respiration was at first quickened, but subsequently reduced, and the heart's action was diminished, and rendered irregular. Marked want of coordinating power over the muscular movements, and loss of power in the pelvis and hind limbs, together with a diminution of temperature in the rectum of about 4°.[53]
Advertisement for Bayer Heroin

Wright's invention did not lead to any further developments, and diacetylmorphine only became popular after it was independently re-synthesized 23 years later by another chemist, Felix Hoffmann. Hoffmann, working at the Aktiengesellschaft Farbenfabriken (today the Bayer pharmaceutical company) in Elberfeld, Germany, was instructed by his supervisor Heinrich Dreser to acetylate morphine with the objective of producing codeine, a constituent of the opium poppy, pharmacologically similar to morphine but less potent and less addictive. Instead the experiment produced an acetylated form of morphine one and a half to two times more potent than morphine itself.

From 1898 through to 1910 diacetylmorphine was marketed under the trademark name Heroin as a non-addictive morphine substitute and cough suppressant. Bayer marketed the drug as a cure for morphine addiction before it was discovered that it rapidly metabolizes into morphine. As such, diacetylmorphine is essentially a quicker acting form of morphine. The company was embarrassed by the new finding, which became a historic blunder for Bayer.[54]

In the U.S.A. the Harrison Narcotics Tax Act was passed in 1914 to control the sale and distribution of diacetylmorphine and other opioids, which allowed the drug to be prescribed and sold for medical purposes. In 1924 the United States Congress banned its sale, importation or manufacture. It is now a Schedule I substance, which makes it illegal for non-medical use in signatory nations of the Single Convention on Narcotic Drugs treaty, including the United States.

The Health Committee of the League of Nations banned diacetylmorphine in 1925 although it took more than three years for this to be implemented. In the meantime, the first designer drugs, viz. 3,6 diesters and 6 monoesters of morphine and acetylated analogues of closely related drugs like hydromorphone and dihydromorphine were produced in massive quantities to fill the worldwide demand for diacetylmorphine—this continued until 1930 when the Committee banned diacetylmorphine analogues with no therapeutic advantage over drugs already in use, the first major legislation of this type.[55]

Later, as with Aspirin, Bayer lost some of its trademark rights to Heroin under the 1919 Treaty of Versailles following the German defeat in World War I.[56]

Routes of administration

Recreational uses:

Medicinal uses:

  • Powerful analgesic (pain killer)
  • Cough suppressant
  • Anti-diarrheal
Contraindications:
Central nervous system:

Neurological:

Psychological:

Cardiovascular & Respiratory:

Gastrointestinal:

Musculoskeletal:

  • Analgesia
  • Ataxia
  • Muscle spasticity

Skin:

  • Itching
  • Flushing/Rash

Miscellaneous:

Diamorphine ampoules for medicinal use

The onset of heroin's effects depends upon the route of administration. Studies have shown that the subjective pleasure of drug use (the reinforcing component of addiction) is proportional to the rate at which the blood level of the drug increases.[57] Intravenous injection is the fastest route of drug administration, causing blood concentrations to rise the most quickly, followed by smoking, suppository (anal or vaginal insertion), insufflation (snorting), and ingestion (swallowing).

Ingestion does not produce a rush as forerunner to the high experienced with the use of heroin, which is most pronounced with intravenous use. While the onset of the rush induced by injection can occur in as little as a few seconds, the oral route of administration requires approximately half an hour before the high sets in. Thus, with both higher the dosage of heroin used and faster the route of administration used, the higher potential risk for psychological addiction.

Large doses of heroin can cause fatal respiratory depression, and the drug has been used for suicide or as a murder weapon. The serial killer Dr Harold Shipman used it on his victims, as did Dr John Bodkin Adams (see his victim: Edith Alice Morrell).

Because significant tolerance to respiratory depression develops quickly with continued use and is lost just as quickly during withdrawal, it is often difficult to determine whether a heroin lethal overdose was accidental, suicide or homicide. Examples include the overdose deaths of Sid Vicious, Janis Joplin, Tim Buckley, Layne Staley, Bradley Nowell, Ted Binion, and River Phoenix.[58]

Chronic use of heroin and other opioids, has potentially been shown to be a cause of hyponatremia, resultant because of excess vasopressin secretion.

Oral

Oral use of heroin is less common than other methods of administration, mainly because there is little to no "rush", and the effects are less potent.[59] Heroin is entirely converted to morphine by means of first-pass metabolism, resulting in deacetylation when ingested. Heroin's oral bioavailability is both dose-dependent (as is morphine's) and significantly higher than oral use of morphine itself, reaching up to 64.2% for high doses and 45.6% for low doses; opiate-naive users showed far less absorption of the drug at low doses, having bioavailabilities of only up to 22.9%. The maximum plasma concentration of morphine following oral administration of heroin was around twice as much as that of oral morphine.[60]

Injection

Injecting Heroin With Latex Tourniquet

Injection, also known as "slamming", "banging", "shooting up" or "mainlining", is a popular method used by addicts which carries relatively greater risks than other methods of administration. Heroin base (commonly found in Europe), when prepared for injection will only dissolve in water when mixed with an acid (most commonly citric acid powder or lemon juice) and heated. Heroin in the United States is most commonly found in the hydrochloride salt form, requiring just water to dissolve. Users tend to initially inject in the easily accessible arm veins, but as these veins collapse over time, through damage caused by the acid, the user will often resort to injecting in other veins. Intravenous users can use a various single dose range using a hypodermic needle. The dose of heroin used for recreational purposes is dependant on the frequency and level of use, thus a first-time user may use between 5 and 20 mg, while an addict may require several hundred mg per day.[61] As with the injection of any drug, if a group of users share a common needle without sterilization procedures, blood-borne diseases, such as HIV or hepatitis, can be transmitted.

Smoking

Smoking heroin refers to vaporizing it to inhale the resulting fumes, not burning it to inhale the resulting smoke. It is commonly smoked in glass pipes made from glassblown Pyrex tubes and light bulbs. It can also be smoked off aluminium foil, which is heated underneath by a flame. This method is also known as "chasing the dragon" (whereas smoking methamphetamine is known as "chasing the white dragon").

Insufflation

Another popular route to intake heroin is insufflation (snorting), where a user crushes the heroin into a fine powder and then sharply inhales it (sometimes with a straw or a rolled up banknote, as with cocaine) into the nose where heroin is absorbed through the soft tissue in the mucous membrane of the sinus cavity and straight into the bloodstream. This method of administration redirects first pass metabolism, with a quicker onset and higher bioavailability than oral administration, though the duration of action is shortened. This method is sometimes preferred by users who do not want to prepare and administer heroin for injection or smoking, but still experience a fast onset with a rush.

Suppository

Little research has been focused on the suppository (anal or vaginal insertion) method of administration, also known as "plugging". This method of administration is commonly administered using an oral syringe. Heroin can be dissolved and withdrawn into an oral syringe which may then be lubricated and inserted into the anus or vagina before the plunger is pushed. Rectal administration of heroin is very efficient, as the dose used is slightly larger than the dose used for IV. Users get a rush from the drugs effects starting 40 seconds after administration, which has been described as being as overwhelming as intravenous use. The rectum and the vaginal canal is where the majority of the drug would likely be taken up, through the membranes lining its walls.

Regulation

In the Netherlands, diacetylmorphine is a List I drug of the Opium Law. It is available for prescription under tight regulation exclusively to long-term addicts for whom methadone maintenance treatment has failed. It cannot be used to treat severe pain or other illnesses.

In the United States, diacetylmorphine is a schedule I drug according to the Controlled Substances Act of 1970, making it illegal to possess without a DEA license. Possession of more than 100 grams of diacetylmorphine or a mixture containing diacetylmorphine is punishable with a minimum mandatory sentence of 5 years of imprisonment in a federal prison.

In Canada, diacetylmorphine is a controlled substance under Schedule I of the Controlled Drugs and Substances Act (CDSA). Any person who seeks or obtains diacetylmorphine without disclosing authorization 30 days prior to obtaining another prescription from a practitioner is guilty of an indictable offense and subject to imprisonment for a term not exceeding seven years. Possession of diacetylmorphine for the purpose of trafficking is guilty of an indictable offense and subject to imprisonment for life.

In Hong Kong, diacetylmorphine is regulated under Schedule 1 of Hong Kong's Chapter 134 Dangerous Drugs Ordinance. It is available by prescription. Anyone who supplies diacetylmorphine without a valid prescription can be fined $10,000 (HKD). The penalty for trafficking or manufacturing diacetylmorphine is a $5,000,000 (HKD) fine and life imprisonment. Possession of diacetylmorphine without a license from the Department of Health is illegal with a $1,000,000 (HKD) fine and/or 7 years of jail time.

In the United Kingdom, diacetylmorphine is available by prescription, though it is a restricted Class A drug. According to the 50th edition of the British National Formulary (BNF), diamorphine hydrochloride may be used in the treatment of acute pain, myocardial infarction, acute pulmonary oedema, and chronic pain. The treatment of chronic non-malignant pain must be supervised by a specialist. The BNF notes that all opioid analgesics cause dependence and tolerance but that this is "no deterrent in the control of pain in terminal illness". When used in the palliative care of cancer patients, diacetylmorphine is often injected using a syringe driver.

Production and trafficking

Production

Diacetylmorphine is produced from acetylation of morphine derived from natural opium sources. Numerous mechanical and chemical means are used to purify the final product. The final products have a different appearance depending on purity and have different names.[62]

Trafficking

International drug routes

Traffic is heavy worldwide, with the biggest producer being Afghanistan.[63] According to a U.N. sponsored survey,[6] as of 2004, Afghanistan accounted for production of 87 percent of the world's diacetylmorphine.[64] Afghan opium kills around 100,000 people annually.[65]

The cultivation of opium in Afghanistan reached its peak in 1999, when 350 square miles (910 km2) of poppies were sown. The following year the Taliban banned poppy cultivation, a move which cut production by 94 percent. By 2001 only 30 square miles (78 km2) of land were in use for growing opium poppies. A year later, after American and British troops had removed the Taliban and installed the interim government, the land under cultivation leapt back to 285 square miles (740 km2), with Afghanistan supplanting Burma to become the world's largest opium producer once more.[66] Opium production in that country has increased rapidly since, reaching an all-time high in 2006. War in Afghanistan once again appeared as a facilitator of the trade.[67] Some 3.3 million Afghans are involved in producing opium.[68]

At present, opium poppies are mostly grown in Afghanistan, and in Southeast Asia, especially in the region known as the Golden Triangle straddling Myanmar, Thailand, Vietnam, Laos and Yunnan province in the People's Republic of China. There is also cultivation of opium poppies in the Sinaloa region of Mexico and in Colombia. The majority of the heroin consumed in the United States comes from Mexico and Colombia. Up until 2004, Pakistan was considered one of the biggest opium-growing countries.

Conviction for trafficking heroin carries the death penalty in most Southeast Asian, some East Asian and Middle Eastern countries (see Use of death penalty worldwide for details), among which Malaysia, Singapore and Thailand are the most strict. The penalty applies even to citizens of countries where the penalty is not in place, sometimes causing controversy when foreign visitors are arrested for trafficking, for example the arrest of nine Australians in Bali, the death sentence given to Nola Blake in Thailand in 1987, or the hanging of an Australian citizen Van Tuong Nguyen in Singapore.

Trafficking history

Primary worldwide producers of heroin

The origins of the present international illegal heroin trade can be traced back to laws passed in many countries in the early 1900s that closely regulated the production and sale of opium and its derivatives including heroin. At first, heroin flowed from countries where it was still legal into countries where it was no longer legal. By the mid-1920s, heroin production had been made illegal in many parts of the world. An illegal trade developed at that time between heroin labs in China (mostly in Shanghai and Tianjin) and other nations. The weakness of government in China and conditions of civil war enabled heroin production to take root there. Chinese triad gangs eventually came to play a major role in the illicit heroin trade. The French Connection route started in the 1930s.

Heroin trafficking was virtually eliminated in the U.S. during World War II because of temporary trade disruptions caused by the war. Japan's war with China had cut the normal distribution routes for heroin and the war had generally disrupted the movement of opium.

After World War II, the Mafia took advantage of the weakness of the postwar Italian government and set up heroin labs in Sicily. The Mafia took advantage of Sicily's location along the historic route opium took westward into Europe and the United States.[69]

Large scale international heroin production effectively ended in China with the victory of the communists in the civil war in the late 1940s.[citation needed] The elimination of Chinese production happened at the same time that Sicily's role in the trade developed.

Although it remained legal in some countries until after World War II, health risks, addiction, and widespread recreational use led most western countries to declare heroin a controlled substance by the latter half of the 20th century.

In late 1960s and early 70s, the CIA supported anti-Communist Chinese Nationalists settled near Sino-Burmese border and Hmong tribesmen in Laos. This helped the development of the Golden Triangle opium production region, which supplied about one-third of heroin consumed in US after 1973 American withdrawal from Vietnam. As of 1999, Myanmar (formerly Burma), the heartland of the Golden Triangle remained the second largest producer of heroin, after Afghanistan.[70]

Soviet-Afghan war led to increased production in the Pakistani-Afghani border regions, as U.S.-backed mujaheddin militants raised money for arms from selling opium, contributing heavily to the modern Golden Crescent creation. By 1980, 60% of heroin sold in the U.S. originated in Afghanistan.[70] It increased international production of heroin at lower prices in the 1980s. The trade shifted away from Sicily in the late 1970s as various criminal organizations violently fought with each other over the trade. The fighting also led to a stepped up government law enforcement presence in Sicily.

Street price

The European Monitoring Centre for Drugs and Drug Addiction reports that the retail price of brown heroin varies from 14.5 per gram in Turkey to €110 per gram in Sweden, with most European countries reporting typical prices of €35-40 per gram. The price of white heroin is reported only by a few European countries and ranged between €27 and €110 per gram.[71]

The United Nations Office on Drugs and Crime claims in its 2008 World Drug Report that typical US retail prices are US$172 per gram.[72]

Harm reduction

Data from The Lancet shows diacetylmorphine to be the most addictive and most harmful of twenty popular recreational drugs.[73]

Harm reduction is a public health philosophy that seeks to reduce the harms associated with the use of diacetylmorphine. One aspect of harm reduction initiatives focuses on the behaviour of individual users. This includes promoting safer means of taking the drug, such as smoking, nasal use, oral or rectal insertion. This attempts to avoid the higher risks of overdose, infections and blood-borne viruses associated with injecting the drug. Other measures include using a small amount of the drug first to gauge the strength, and minimize the risks of overdose. For the same reason, poly drug use (the use of two or more drugs at the same time) is discouraged. Injecting diacetylmorphine users are encouraged to use new needles, syringes, spoons/steri-cups and filters every time they inject and not share these with other users. Users are also encouraged to not use it on their own, as others can assist in the event of an overdose.

Governments that support a harm reduction approach usually fund needle & syringe exchange programmes, which supply new needles and syringes on a confidential basis, as well as education on proper filtering prior to injection, safer injection techniques, safe disposal of used injecting gear and other equipment used when preparing diacetylmorphine for injection may also be supplied including citric acid sachets/vitamin C sachets, steri-cups, filters, alcohol pre-injection swabs, sterile water ampules and tourniquets (to stop use of shoe laces or belts).

Another harm reduction measure employed for example in Europe, Canada and Australia are safe injection sites where users can inject diacetylmorphine and cocaine under the supervision of medically trained staff. Safe injection sites are low threshold and allow social services to approach problem users that would otherwise be hard to reach.[74]

Popular culture

Actors

A number of actors are known for their use of heroin. Among them are:

Film and television

  • The film, American Gangster, is loosely based on real life drug dealer Frank Lucas, who sold heroin.[81]
  • The film Gia, based on a true story of model Gia Carangi, is about her addiction and use of heroin and how it affected her.[82]
  • The film Trainspotting chronicles the exploits of a group of heroin addicts in Edinburgh, Scotland, during the late 1980s.

Musicians

Use of heroin by musicians has been recorded in the following cases.

Songs

Songs about heroin include:

Writers

Writers known to have used heroin are;

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  131. ^ Race Matters
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Further reading

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