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  1. Originally Posted by BJ_M
    Originally Posted by doppletwo
    Originally Posted by BJ_M
    yea right -- sure ...

    nicotine is one bad assed poison, one of the deadliest ..

    even the cbc tested random coffee to put this rumor to bed ..
    Nicotine is only deadly in mega doses.

    Cancer doesn't run in my family so I know at least 10 people over 60 who have smoked a pack a day since their teens.

    There are other chemcials in the tabacco that make it worsde also.

    The nicotine gun won't give throat cancer in the studies that have been done.

    Also Krispy Kreme has the best donuts, but I have never tried their coffee. I am from Seattle so I am quite a coffe snob. If it isn't freshly roasted and ground it probably sucks.

    I have never actually had Starbucks it costs too much and there are so many other places to get good coffee here.


    another wacky statement -- No one has claimed Nicotine causes cancer - its all the other stuff ..

    Further-
    Nicotine is one of the most toxic of all poisons and has a rapid onset of action. Apart from local caustic actions, the target organs are the peripheral and central nervous systems.


    I will copy the complete abstract from IPCS INCHEM (International Programme on Chemical Safety, a cooperative programme of the World Health Organization (WHO), the International Labour Organisation (ILO), and the United Nations Environment Programme (UNEP). The authoritative source on the risk assessment of chemicals.)


    Nicotine
    1. NAME
    1.1 Substance
    1.2 Group
    1.3 Synonyms
    1.4 Identification numbers
    1.4.1 CAS number
    1.4.2 Other numbers
    1.5 Brand names, Trade names
    1.6 Manufacturers, Importers
    2. SUMMARY
    2.1 Main risks and target organs
    2.2 Summary of clinical effects
    2.3 Diagnosis
    2.4 First-aid measures and management principles
    3. PHYSICO-CHEMICAL PROPERTIES
    3.1 Origin of the substance
    3.2 Chemical structure
    3.3 Physical properties
    3.4 Other characteristics
    4. USES/CIRCUMSTANCES OF POISONING
    4.1 Uses
    4.2 High risk circumstance of poisoning
    4.3 Occupationally exposed populations
    5. ROUTES OF ENTRY
    5.1 Oral
    5.2 Inhalation
    5.3 Dermal
    5.4 Eye
    5.5 Parenteral
    5.6 Others
    6. KINETICS
    6.1 Absorption by route of exposure
    6.2 Distribution by route of exposure
    6.3 Biological half-life by route of exposure
    6.4 Metabolism
    6.5 Elimination by route of exposure
    7. TOXICOLOGY
    7.1 Mode of Action
    7.2 Toxicity
    7.2.1 Human data
    7.2.1.1 Adults
    7.2.1.2 Children
    7.2.2 Relevant animal data
    7.2.3 Relevant in vitro data
    7.2.4 Workplace standards
    7.2.5 Acceptable daily intake (ADI) and other guideline levels
    7.3 Carcinogenicity
    7.4 Teratogenicity
    7.5 Mutagenicity
    7.6 Interactions
    8. TOXICOLOGICAL ANALYSES AND BIOMEDICAL INVESTIGATIONS
    8.1 Material sampling plan
    8.1.1 Sampling and specimen collection
    8.1.1.1 Toxicological analyses
    8.1.1.2 Biomedical analyses
    8.1.1.3 Arterial blood gas analysis
    8.1.1.4 Haematological analyses
    8.1.1.5 Other (unspecified) analyses
    8.1.2 Storage of laboratory samples and specimens
    8.1.2.1 Toxicological analyses
    8.1.2.2 Biomedical analyses
    8.1.2.3 Arterial blood gas analysis
    8.1.2.4 Haematological analyses
    8.1.2.5 Other (unspecified) analyses
    8.1.3 Transport of laboratory samples and specimens
    8.1.3.1 Toxicological analyses
    8.1.3.2 Biomedical analyses
    8.1.3.3 Arterial blood gas analysis
    8.1.3.4 Haematological analyses
    8.1.3.5 Other (unspecified) analyses
    8.2 Toxicological Analyses and Their Interpretation
    8.2.1 Tests on toxic ingredient(s) of material
    8.2.1.1 Simple Qualitative Test(s)
    8.2.1.2 Advanced Qualitative Confirmation Test(s)
    8.2.1.3 Simple Quantitative Method(s)
    8.2.1.4 Advanced Quantitative Method(s)
    8.2.2 Tests for biological specimens
    8.2.2.1 Simple Qualitative Test(s)
    8.2.2.2 Advanced Qualitative Confirmation Test(s)
    8.2.2.3 Simple Quantitative Method(s)
    8.2.2.4 Advanced Quantitative Method(s)
    8.2.2.5 Other Dedicated Method(s)
    8.2.3 Interpretation of toxicological analyses
    8.3 Biomedical investigations and their interpretation
    8.3.1 Biochemical analysis
    8.3.1.1 Blood, plasma or serum
    8.3.1.2 Urine
    8.3.1.3 Other fluids
    8.3.2 Arterial blood gas analyses
    8.3.3 Haematological analyses
    8.3.4 Interpretation of biomedical investigations
    8.4 Other biomedical (diagnostic) investigations and their interpretation
    8.5 Overall Interpretation of all toxicological analyses and toxicological investigations
    8.6 References
    9. CLINICAL EFFECTS
    9.1 Acute poisoning
    9.1.1 Ingestion
    9.1.2 Inhalation
    9.1.3 Skin exposure
    9.1.4 Eye contact
    9.1.5 Parenteral exposure
    9.1.6 Other
    9.2 Chronic poisoning
    9.2.1 Ingestion
    9.2.2 Inhalation
    9.2.3 Skin exposure
    9.2.4 Eye contact
    9.2.5 Parenteral exposure
    9.2.6 Other
    9.3 Course, prognosis, cause of death
    9.4 Systematic description of clinical effects
    9.4.1 Cardiovascular
    9.4.2 Respiratory
    9.4.3 Neurological
    9.4.3.1 CNS
    9.4.3.2 Peripheral nervous system
    9.4.3.3 Autonomic nervous system
    9.4.3.4 Skeletal and smooth muscle
    9.4.4 Gastrointestinal
    9.4.5 Hepatic
    9.4.6 Urinary
    9.4.6.1 Renal
    9.4.6.2 Others
    9.4.7 Endocrine and reproductive systems
    9.4.8 Dermatological
    9.4.9 Eye, ears, nose, throat: local effects
    9.4.10 Haematological
    9.4.11 Immunological
    9.4.12 Metabolic
    9.4.12.1 Acid-base disturbances
    9.4.12.2 Fluid and electrolyte disturbances
    9.4.12.3 Others
    9.4.13 Allergic reactions
    9.4.14 Other clinical effects
    9.4.15 Special risks
    9.5 Others
    9.6 Summary
    10. MANAGEMENT
    10.1 General principles
    10.2 Relevant laboratory analyses and other investigations
    10.2.1 Sample collection
    10.2.2 Biomedical analysis
    10.2.3 Toxicological analysis
    10.2.4 Other investigations
    10.3 Life supportive procedures and symptomatic treatment
    10.4 Decontamination
    10.5 Elimination
    10.6 Antidote treatment
    10.6.1 Adults
    10.6.2 Children
    10.7 Management discussion
    11. ILLUSTRATIVE CASES
    11.1 Case reports from literature
    11.2 Internally extracted data on cases
    11.3 Internal cases
    12. ADDITIONAL INFORMATION
    12.1 Availability of antidotes
    12.2 Specific preventive measures
    12.3 Other
    13. REFERENCES
    14. AUTHOR(S), REVIEWER(S), DATE(S) (INCLUDING UPDATES), COMPLETE ADDRESSES

    CHEMICAL SUBSTANCES
    1. NAME
    1.1 Substance
    Nicotine
    1.2 Group
    Alkaloid of Nicotiana Tabacum
    1.3 Synonyms
    (S)-3-(1-Methylpyrrolidin-2-yl)pyridine
    1.4 Identification numbers
    1.4.1 CAS number
    54-11-5
    1.4.2 Other numbers
    1.5 Brand names, Trade names
    Nicabate
    Nicobrevin
    Nicotinell TTS
    Nicorette
    Nicoret
    Cigarette tobacco
    Black leaf
    Nicocide
    Nico-fume


    Transdermal patches deliver 5 to 30 mg nicotine over 24 hours;
    used patch has significant nicotine content

    Cigarette tobacco varies in its nicotine content but common
    blends contain 15 to 25 mg per cigarette with a current trend
    towards lower levels.

    Nicotine insecticides: 40% solution of the sulfate.

    Chewing gum - nicotine polacrilex: 2 and 4 mg nicotine bound
    to an ion exchange resin in a sugar-free flavoured chewing gum
    base.
    1.6 Manufacturers, Importers
    Ciba Geigy
    Glaxo-Lake Pharmaceuticals
    Lundbeck Ltd
    Merrell
    2. SUMMARY
    2.1 Main risks and target organs
    Nicotine is one of the most toxic of all poisons and has a
    rapid onset of action. Apart from local caustic actions, the
    target organs are the peripheral and central nervous systems.
    Nicotine is also a powerfully addictive drug.
    2.2 Summary of clinical effects
    Burning sensation in the mouth and throat, salivation,
    nausea, abdominal pain, vomiting and diarrhoea.
    Gastrointestinal reactions are less severe but can occur even
    after cutaneous and respiratory exposure.

    Systemic
    effects include: agitation, headache, sweating, dizziness,
    auditory and visual disturbances, confusion, weakness and lack

    of coordination.

    A transient increase in blood
    pressure, followed by hypertension, bradycardia, paroxysmal
    atrial fibrillation, or cardiac standstill may be observed.


    In severe poisoning, tremor, convulsions and coma occur.
    Faintness, prostration, cyanosis and dyspnoea progress to
    collapse. Death may occur from paralysis of respiratory muscles
    and/or central respiratory failure.
    2.3 Diagnosis
    Burning sensation in the mouth and throat, salivation,
    nausea, abdominal pain, vomiting and diarrhoea
    Agitation, headache, sweating, dizziness, auditory and visual
    disturbances, confusion, weakness and lack of coordination.

    In severe poisoning, tremor, convulsions and coma occur.
    Faintness, prostration, cyanosis and dyspnoea progress to
    collapse.

    Plasma nicotine level: nicotine concentrations in the urine
    are not useful in the management of overdose since these vary
    according to changes in pH and urine flow.

    White cell count: polymorphonuclear leucocytosis

    Urinalysis: glycosuria.
    2.4 First-aid measures and management principles
    There are no known antidotes.

    Immediate establishment of an airway, monitoring of breathing
    patterns, and maintenance of circulation are essential in
    cases of serious overdose. Preparations for possible seizures
    or rapid progression to coma and artificial ventilation
    procedures should be kept ready, oxygen may be required.

    If vomiting has not occurred following nicotine ingestion,
    remove stomach contents by gastric lavage. Induction of
    emesis is less preferable to lavage since convulsions or coma
    may intervene.

    Single or multiple doses of activated charcoal may be used.
    Children who ingest more than one cigarette should receive
    activated charcoal and medical observation for at least
    several hours.

    If nicotine is spilled on the skin, immediately wash
    thoroughly with running water (avoid warm water).

    Seizure activity and agitation can be controlled with diazepam
    or barbiturates.

    Cholinergic symptoms may be ameliorated with atropine.
    3. PHYSICO-CHEMICAL PROPERTIES
    3.1 Origin of the substance

    Nicotine is a natural alkaloid obtained from the dried
    leaves and stems of the Nicotiana tabacum and Nicotiana rustica,
    where it occurs in concentrations of 0.5-8%. Cigarette tobacco
    varies in its nicotine content, but common blends contain 15-25
    mg per cigarette, with a current trend towards lower
    levels.
    3.2 Chemical structure
    3.3 Physical properties
    Molecular weight: 162.26

    Nicotine is a liquid alkaloid. It is water soluble and
    has a pKa of 8.5. It is a bitter-tasting liquid which is
    strongly alkaline in reaction and forms salts with acids.
    3.4 Other characteristics
    Store at room temperature, below 86 F (30°C). Protect from
    light and air.
    4. USES/CIRCUMSTANCES OF POISONING
    4.1 Uses
    Nicotine is most frequently encountered in tobacco
    products for smoking, chewing, sniffing and tobacco
    "without smoking".

    As an insecticide (now rare), and as an adjunct to
    smoking cessation programmes (gums, patches). It is a substance
    of abuse.
    4.2 High risk circumstance of poisoning
    Nicotine is most frequently encountered in tobacco products
    for smoking, chewing, sniffing and tobacco "without smoking".

    As an insecticide (now rare), and as an adjunct to smoking
    cessation programmes (gums, patches). It is a substance of
    abuse.
    4.3 Occupationally exposed populations
    People who are involved in the processing and extracting
    tobacco (green tobacco sickness), as well as mixing, storing
    and applying certain insecticides.
    5. ROUTES OF ENTRY
    5.1 Oral
    Poisoning occurs in children who ingest cigarettes or
    cigars or 2nicotine gum. In adults chewing tobacco or nicotine
    gum, and people who ingest liquid nicotine in the form of
    insecticide preparations.
    5.2 Inhalation
    Inhalation is the most frequent route of entry because of
    worldwide tobacco smoking.
    5.3 Dermal
    Dermal exposure to nicotine can lead to intoxication. Such
    exposure has been reported after spilling or applying nicotine-
    containing insecticides on the skin or clothes (Loockhart,
    1933; Benowitz, 1987), and as a consequence of occupational
    contact with tobacco leaves (green tobacco sickness)
    (Weizenecker, 1970; Gehlbach, 1974).
    5.4 Eye
    No data available.
    5.5 Parenteral
    No data available.

    5.6 Others
    Tobacco has been used in enemas and poultices (Gosselin,
    1988).
    6. KINETICS
    6.1 Absorption by route of exposure
    Nicotine is a water and lipid soluble drug which, in the
    free base form, is readily absorbed via respiratory tissues,
    skin, and the gastrointestinal tract. Nicotine may pass
    through skin or mucous membranes when in alkaline solution (in
    which nicotine is largely unionized).

    When tobacco smoke reaches the small airways and alveoli of
    the lung, the nicotine is rapidly absorbed. The rapid
    absorption of nicotine from cigarette smoke through the lungs
    occurs because of the huge surface area of the alveoli and
    small airways, and because of dissolution of nicotine at
    physiological pH (approximately 7.4) which facilitates
    transfer across cell membranes.

    Chewing tobacco, snuff, and nicotine polacrilex gum are of
    alkaline pH as a result of the selection of appropriate
    tobacco and/or buffering with additives by the manufacturers.
    The alkaline pH facilitates absorption of nicotine through
    mucous membranes.
    6.2 Distribution by route of exposure
    After absorption, nicotine enters the blood where, at pH
    7.4, it is about 70% ionized. Binding to plasma proteins is less
    than 5%. Studies showed that, after intravenous administration,
    the distribution of C14-labeled nicotine is immediate, reaching
    the brain of mice within 1 min. after injection. Similar
    findings based on positron emission tomography of the brain,
    were seen after injection of 11C-nicotine in monkeys. (US
    Department of Health Report of Surgeon General 1988).

    Nicotine inhaled in tobacco smoke enters the blood almost as
    rapidly as after rapid I.V. injections. Because of delivery
    into the lung, peak nicotine levels may be higher and lag time
    between smoking and entry into the brain shorter than after IV
    injection.

    After smoking, the action of nicotine on the brain is expected
    to occur quickly. Rapid onset of effects after a puff is
    believed to provide optimal reinforcement for the development
    of drug dependence. The effect of nicotine declines as it is
    distributed to other tissues. The distribution half-life,
    which describes the movement of nicotine from the blood and
    other rapidly perfused tissues, such as the brain, to other
    body tissues, is about 9 min. (Feyerabend, 1985). Distribution
    kinetics, rather than elimination kinetics (half-life about 2
    hr) determine the time course of the CNS actions of nicotine
    after smoking a single cigarette.

    The apparent volume of distribution in animals is
    approximately 1.0 L/kg whereas in one clinical study it was
    2.0 L/kg in smokers and 3.0 L/kg in nonsmokers (Ellenhorn,
    1988).

    6.3 Biological half-life by route of exposure
    The elimination half-life of nicotine averages 2 hours
    (Benowitz, 1982 Feyerabend, 1985). The half-life of a drug
    is useful in predicting the rate of accumulation of that drug
    in the body with repetitive dosing and the time course of
    decline after cessation of dosing. Consistent with a half-life
    of 2 hours, accumulation of nicotine over 6 to 8 hours during
    regular smoking and persistence of significant levels of
    nicotine in the blood for 6 to 8 hours after cessation of
    smoking, i.e. overnight, has been observed (Benowitz, 1982b).
    Thus, cigarette smoking represents a situation where the
    smoker is exposed to significant concentrations and possibly
    pharmacological effects of nicotine for 24 hours a day.

    Apparent acute tolerance to nicotine, determined on the basis
    of observations of the relationship between venous blood
    levels and effects, may be due to distribution disequilibrium
    between venous and arterial blood; venous blood levels
    substantially underestimate concentrations of nicotine in
    arterial blood and at potential sites of action. True
    tolerance does, however, develop rapidly, with a half-life of
    development and regression of about 35 minutes. The kinetics
    of tolerance may be another determinant of cigarette smoking
    particularly when the smoker smokes his next cigarette.
    6.4 Metabolism
    Nicotine is a tertiary amine which is composed of a
    pyridine and a pyrrolidine ring. Nicotine undergoes a large
    first pass effect during which the liver metabolizes 80% to 90%;
    to a smaller extent, the lung also is able to metabolize
    nicotine.

    The major metabolite of nicotine is cotinine; nicotine-1'-N-
    oxide is a minor metabolite. Cotinine is also extensively
    metabolized and trans-3'-hydroxycotinine is its a major
    metabolite. The most abundant metabolite in the mice is trans-
    3'-hydroxy-cotinine, accounting for almost 40%, whereas
    cotinine itself accounts for only about 15% of the dose of
    nicotine.

    Cotinine levels in various biological fluids are widely used
    to estimate intake of nicotine in tobacco users. The
    usefulness of cotinine as a quantitative marker of nicotine
    intake, is limited by individual variability in percentage
    conversion of nicotine to cotinine and in rate of elimination
    of cotinine itself. Since it accounts for a much greater
    percentage of nicotine, trans-3'-hydroxycotinine measurement,
    either alone or in combination with measurement of other
    metabolites, may be a superior quantitative marker of nicotine
    intake.
    6.5 Elimination by route of exposure
    Nicotine and its metabolites (cotinine and nicotine 1-N-oxide)
    are excreted in the urine. At a pH of 5.5 or less, 23% is
    excreted unchanged. At a pH of 8, only 2% is excreted in the
    urine. The effect of urinary pH on total clearance is due
    entirely to changes in renal clearance. (Ellenhorn, 1988).


    Nicotine is secreted into saliva. Passage of saliva containing
    nicotine into the stomach, combined with the trapping of
    nicotine in the acidic gastric fluid and reabsorption from the
    small bowel, provides a potential route for enteric nicotine
    recirculation. This recirculation may account for some of the
    oscillations in the terminal decline phase of nicotine blood
    levels after I.V. nicotine infusion or cessation of smoking.

    Nicotine freely crosses the placenta and has been found in
    amniotic fluid and the umbilical cord blood of neonates.
    Nicotine is found in breast milk and the breast fluid of non-
    lactating women and in cervical mucous secretions (US
    Department of Health and Human Services, a report of the
    Surgeon General 1988).
    7. TOXICOLOGY
    7.1 Mode of Action
    Nicotine is an agonist at nicotinic receptors in the
    peripheral and central nervous system. In man, as in animals,
    nicotine has been shown to produce both behavioral stimulation
    and depression. Pharmacodynamic studies indicate a complex
    dose response relationship, due both to complexity of
    intrinsic pharmacological actions and to rapid development of
    tolerance.
    7.2 Toxicity
    7.2.1 Human data
    7.2.1.1 Adults
    The mean lethal dose has been estimated to be 30
    to 60 mg (0.5-1.0 mg/kg) (Gosselin, 1988).
    7.2.1.2 Children
    The lethal dose is considered to be about 10 mg
    of nicotine (Arena, 1974).
    7.2.2 Relevant animal data
    Dog: oral LD50: 9.2 mg/kg
    mouse: oral LD50: 3.3 mg/kg (RTECS, 1985-86)
    rat: oral LD50: 50 mg/kg
    7.2.3 Relevant in vitro data
    No data available.
    7.2.4 Workplace standards
    MSHA standard air : TWA = 0.5 mg/m3 (skin)
    OSHA standard air : TWA = 0.5 mg/m3 (skin)
    (RTECS, 1985-86)
    7.2.5 Acceptable daily intake (ADI) and other guideline levels
    Not relevant.
    7.3 Carcinogenicity
    Literature reports indicate that nicotine is neither an
    initiator nor a promoter of tumours in mice. There is
    inconclusive evidence to suggest that cotinine, an oxidized
    metabolite of nicotine, may be carcinogenic in the rat. (PDR,
    1987).
    7.4 Teratogenicity
    Nicotine rapidly crosses the placenta and enters the fetus.
    Some investigations have reported teratogenic effects of high
    doses of nicotine, which interfered with osteogenesis in mice
    and chick embryos. Chronic nicotine treatments of pregnant
    rats throughout gestation produced subtle neurological changes
    which manifested themselves as behavioral or

    electrophysiological alterations in the offspring. Thus,
    several studies suggest that nicotine, at least in high doses,
    may have toxic effects on the fetus. Smoking is associated
    with impaired growth and development of the fetus. Whether
    cigarette smoking is associated with increased rates of
    congenital; malformations in humans is controversial. Several
    studies show no association or a lower incidence of
    malformations in offspring of smoking mothers, but other
    reports positive associations. One study has reported an
    association between paternal smoking and the incidence of
    congenital malformations (US Department of Health and Human
    Services (1988)).
    7.5 Mutagenicity
    In the Ames Salmonella typhimurium mutagenesis and mammalian
    cell cytogenic assays, nicotine did not posses any genotoxic
    activity, although it induced separable DNA damage in the
    Escherichia coli pol A+/A-system (US Department of Health and
    Human Services, 1988)
    7.6 Interactions
    Smoking increases the metabolism of certain compounds and
    lowers blood levels of drug such as phenacetin, caffeine,
    theophylline, imipramine and pentazocine through enzyme
    induction. Other reported effects of smoking, which do not
    involve enzyme induction, include reduced diuretic effects of
    furosemide and decreased cardiac output, and antagonism of the
    hypotensive effects of propranolol, which may also relate to
    the normal effects of nicotine. Both smoking and nicotine can
    increase the level of circulating cortisol and catecholamines.
    Therapy with adrenergic agonists or with adrenergic blockers
    may need to be adjusted according to changes in smoking
    status.
    8. TOXICOLOGICAL ANALYSES AND BIOMEDICAL INVESTIGATIONS
    8.1 Material sampling plan
    8.1.1 Sampling and specimen collection
    8.1.1.1 Toxicological analyses
    8.1.1.2 Biomedical analyses
    8.1.1.3 Arterial blood gas analysis
    8.1.1.4 Haematological analyses
    8.1.1.5 Other (unspecified) analyses
    8.1.2 Storage of laboratory samples and specimens
    8.1.2.1 Toxicological analyses
    8.1.2.2 Biomedical analyses
    8.1.2.3 Arterial blood gas analysis
    8.1.2.4 Haematological analyses
    8.1.2.5 Other (unspecified) analyses
    8.1.3 Transport of laboratory samples and specimens
    8.1.3.1 Toxicological analyses
    8.1.3.2 Biomedical analyses
    8.1.3.3 Arterial blood gas analysis
    8.1.3.4 Haematological analyses
    8.1.3.5 Other (unspecified) analyses
    8.2 Toxicological Analyses and Their Interpretation
    8.2.1 Tests on toxic ingredient(s) of material
    8.2.1.1 Simple Qualitative Test(s)
    8.2.1.2 Advanced Qualitative Confirmation Test(s)
    8.2.1.3 Simple Quantitative Method(s)

    8.2.1.4 Advanced Quantitative Method(s)
    8.2.2 Tests for biological specimens
    8.2.2.1 Simple Qualitative Test(s)
    8.2.2.2 Advanced Qualitative Confirmation Test(s)
    8.2.2.3 Simple Quantitative Method(s)
    8.2.2.4 Advanced Quantitative Method(s)
    8.2.2.5 Other Dedicated Method(s)
    8.2.3 Interpretation of toxicological analyses
    8.3 Biomedical investigations and their interpretation
    8.3.1 Biochemical analysis
    8.3.1.1 Blood, plasma or serum
    Not relevant
    8.3.1.2 Urine
    To detect glycosuria
    8.3.1.3 Other fluids
    8.3.2 Arterial blood gas analyses
    Not relevant.
    8.3.3 Haematological analyses
    White cell count or full blood count.
    8.3.4 Interpretation of biomedical investigations
    8.4 Other biomedical (diagnostic) investigations and their
    interpretation
    8.5 Overall Interpretation of all toxicological analyses and
    toxicological investigations
    8.6 References
    9. CLINICAL EFFECTS
    9.1 Acute poisoning
    9.1.1 Ingestion
    Symptoms of nicotine poisoning may develop within 15
    minutes. The onset of symptoms is much more rapid after
    the ingestion of liquid nicotine (e.g. insecticide
    preparations) Death may occur within 5 minutes of
    ingestion of concentrated nicotine insecticides. Four to
    eight milligrams orally may produce serious symptoms in
    individuals not habituated to nicotine. Gastrointestinal
    signs and symptoms occur first and include mouth and
    throat burning followed by profuse salivation, nausea,
    vomiting, abdominal pain and occasionally diarrhoea.

    More severe intoxication results in dizziness, weakness
    and confusion, progressing to convulsions, hypertension
    and coma. Intense vagal stimulation may cause transient
    cardiac standstill or paroxysmal atrial fibrillation.
    Death is usually due to paralysis of respiratory muscles
    and/or central respiratory failure.
    9.1.2 Inhalation
    In humans, acute exposure to nicotine even in low doses
    (similar to the amounts consumed by tobacco users)
    elicits autonomic and somatic reflex effects. Dizziness,
    nausea and/or vomiting are commonly experienced by
    nonsmokers after low doses of nicotine, such as when
    people try their first cigarette. However cigarette
    smokers rapidly become tolerant to these effects.
    9.1.3 Skin exposure
    Dermal exposure to nicotine can also lead to
    intoxication. Such exposures have been reported after

    spilling or applying nicotine containing insecticides on
    the skin or clothes and as consequence of occupational
    contact with tobacco leaves.

    A self-limiting illness known as "green-tobacco
    sickness" has been described in young man handling
    uncured tobacco leaves in the field; it consists of
    pallor, vomiting and prostration and is probably due to
    the percutaneous absorption of nicotine from wet leaves.
    9.1.4 Eye contact
    No data available.
    9.1.5 Parenteral exposure
    No data available.
    9.1.6 Other
    Serious poisoning has occurred from the use of aqueous
    infusions of tobacco as enemas (Gosselin, 1988).
    Nicotine 2 mg administered intranasally as a 2% aqueous
    thickened solution was better absorbed than the same
    dose given as a chewing gum (Russell, 1983)
    9.2 Chronic poisoning
    9.2.1 Ingestion
    Chronic poisoning by nicotine is possible by chewing
    tobacco or nicotine gums.
    9.2.2 Inhalation
    Smoking causes coronary and peripheral vascular disease,
    cancer, chronic obstructive lung disease, peptic ulcer
    and reproductive disturbances, including prematurity.
    Nicotine may contribute to tobacco related disease, but
    direct causation has not been determined because
    nicotine is taken up simultaneously with a multitude of
    other potentially harmful substances that occur in
    tobacco smoke and smokeless tobacco.
    9.2.3 Skin exposure
    Through transdermal nicotine
    9.2.4 Eye contact
    No data available.
    9.2.5 Parenteral exposure
    No data available.
    9.2.6 Other
    Not relevant
    9.3 Course, prognosis, cause of death
    In fatal cases of nicotine poisoning, death is usually rapid;
    it occurs nearly always within 1 hour and occasionally within
    5 minutes. According to the traditional view, death is due to
    paralysis of the respiratory muscles; paralysis of medullary
    centres controlling respiration requires a larger dose.
    Circulatory failure is not necessarily permanent; if heart
    action can be initiated by external cardiac massage or
    intracardiac epinephrine while respiration is maintained,
    death may be prevented (Franke, 1936). If the patient survives
    the initial period, the prognosis is good (Gosselin 1988)
    9.4 Systematic description of clinical effects
    9.4.1 Cardiovascular
    The overall effect on the cardiovascular system leads to
    tachycardia, peripheral vasoconstriction and elevations
    of blood pressure with an attendant increase in the work

    of the heart. Nicotine may induce vasospasm and cardiac
    arrythmias. Tolerance does not develop to the
    catecholamine-releasing effects of nicotine.

    Acute effects

    A transient increase in blood pressure followed by
    bradycardia, paroxysmal atrial fibrillation, or cardiac
    standstill is observed.

    Chronic effects

    Nicotine could contribute both to the atherosclerotic
    process and to acute coronary events by several
    mechanisms. Nicotine could promote atherosclerotic
    disease by its actions on lipid metabolism and
    coagulation by hemodynamic effects and/or by causing
    endothelial injury.

    Nicotine may act by releasing free fatty acids,
    enhancing the conversion of VLDL (very low density
    lipoproteins) to LDL (low density lipoproteins),
    impairing the clearance of LDL and/or by accelerating
    the metabolism of HDL (Brischetto, 1983; Gluette Brown,
    1986; Grasso, 1986; Hojnacki, 1986.)

    Nicotine could affect platelets by increasing the
    release of epinephrine, which is known to enhance
    platelet reactivity by inhibiting prostacyclin, an
    antiaggregatory hormone secreted by endothelial cells,
    or perhaps directly (Sonnenfeld, 1980). Alternatively,
    by increasing heart rate and cardiac output and thereby
    increasing blood turbulence or by a direct action,
    nicotine may promote endothelial injury. Cigarette
    smoking, most likely mediated by nicotine, facilitates
    AV nodal conduction which could result in an increased
    ventricular response during atrial fibrillation (Peters,
    1987). Nicotine could aggravate peripheral vascular
    disease by constricting small collateral arteries and/or
    by inducing local thrombosis. Patients with coronary or
    peripheral vascular disease are likely to suffer some
    increase in risk when taken nicotine. Nicotine could
    contribute to the progression of chronic hypertension by
    aggravating vasoconstriction either in sympathetic activation
    or inhibition of prostaglandin synthesis.

    Based on its pharmacological actions, it is likely that
    nicotine plays a role in causing or aggravating acute
    coronary events. Myocardial infarction can be due to one
    or more of these precipitating factors: excessive demand
    for oxygen and substrates; thrombosis; and coronary
    spasm. Nicotine increases heart rate and blood pressure and,
    therefore, myocardial oxygen consumption.

    Nicotine consumed in the form of nicotine gum has been
    studied in patients with coronary artery disease.

    Nicotine gum (4mg) increased myocardial contractility in
    healthy people, but in patients with coronary artery
    disease, nicotine gum decreased contractility in the
    ischaemic regions of the myocardium, consistent with
    aggravation of ischaemia (Bayer, 1985). In the most
    severe cases of coronary artery disease, overall
    contractility decreased after nicotine gum. This study
    supports the idea that nicotine contributes to the
    induction of myocardial ischaema in susceptible smokers.


    In addition to creating an imbalance between myocardial
    oxygen supply and demand, nicotine may promote
    thrombosis. Nicotine may also induce coronary spasm by
    sympathetic activation or inhibition of prostacyclin.
    Coronary spasm has been observed during cigarette
    smoking (Maouad, 1984).

    Sudden cardiac death in smokers might result from
    ischaemia, combined with the arrhythmogenic effects of
    increased amounts of circulating catecholamines released
    by nicotine.
    9.4.2 Respiratory
    Acute effects

    Initial tachypnoea, but later dyspnoea, decreased
    respiratory rate, and cyanosis may be seen. Respiratory
    arrest may occur within minutes, and resultant death
    within 1 hour.

    Chronic effects

    Nicotine may directly or indirectly influence the
    development of emphysema in smokers, but further
    research is needed to define the magnitude of the
    contribution of nicotine to the pathogenesis of smoking
    including chronic lung disease. Nicotine can also worsen
    pulmonary function in smokers who already have lung
    disease. Acute exposure to nicotine induces constriction
    of both central and peripheral airways (Yamatake, 1978).
    The increase in airways resistance by nicotine involves
    vagal reflexes and stimulation or parasympathetic
    ganglia in the bronchial wall (Nakamme, 1986). The
    magnitude of bronchoconstriction
    observed in experimental animals and humans following
    acute inhalation of cigarette smoke is correlated with
    the level of nicotine in the smoke (Beck, 1986)
    suggesting that nicotine may be an important factor in
    the increased airways resistance of smokers.
    9.4.3 Neurological
    9.4.3.1 CNS
    The effects of nicotine are generally dose-
    dependent and extremely high doses can produce
    toxic symptoms such as delirium. These effects
    also occur in nicotine tolerant individuals.
    Nicotine first stimulates and later depresses

    the CNS. Headache, confusion, dizziness,
    agitation, restlessness and incoordination develop
    initially after serious nicotine overdose; 30 minutes
    later, convulsions and coma occur.
    9.4.3.2 Peripheral nervous system
    Neuromuscular symptoms include hypotonia,
    decreased deep tendon reflexes, weakness,
    fasciculations and paralysis of muscles
    (including respiratory muscles).
    9.4.3.3 Autonomic nervous system
    Cholinergic symptoms often observed initially
    include diaphoresis, salivation, lacrimation,
    increased bronchial secretions, miosis and later
    mydriasis.

    Nicotine has actions at the sympathetic ganglia
    and on the chemoreceptors of the aorta and
    carotid bodies. Nicotine also affects the
    adrenal medulla, releasing catecholamines.
    9.4.3.4 Skeletal and smooth muscle
    Weakness, fasciculations and paralysis of
    muscles (including respiratory muscles)
    9.4.4 Gastrointestinal
    Acute effects

    Gastrointestinal symptoms occur first and include
    burning of the mouth and throat followed by profuse
    salivation, nausea, vomiting, abdominal pain and
    occasionally diarrhoea.

    Chronic effects

    Cigarette smoking is a risk factor for peptic ulcer
    disease and an even stronger risk factor for delayed
    healing, failure to respond to therapy and relapse
    (Kikendall, 1984). In animals, nicotine potentiates
    peptic ulcer formation induced by histamine or
    pentagastrin (Konturek, 1971).
    9.4.5 Hepatic
    No data available.
    9.4.6 Urinary
    9.4.6.1 Renal
    9.4.6.2 Others
    9.4.7 Endocrine and reproductive systems
    The action of nicotine on the adrenal medulla (release
    of catecholamines) does not appear to be affected by
    tolerance, and may aggravate patients with
    hyperthyroidism, phaeochromocytoma or insulin-dependent
    diabetes.
    9.4.8 Dermatological
    No data available.
    9.4.9 Eye, ears, nose, throat: local effects
    No data available.
    9.4.10 Haematological
    No data available.
    9.4.11 Immunological

    No data available.
    9.4.12 Metabolic
    9.4.12.1 Acid-base disturbances
    Not relevant.
    9.4.12.2 Fluid and electrolyte disturbances
    Not relevant.
    9.4.12.3 Others
    Action on lipids.

    Nicotine may act by releasing free fatty acids,
    enhancing the conversion of VLDL (very low
    density lipoproteins) to LDL (low density
    lipoproteins), impairing the clearance of LDL
    and/or by accelerating the metabolism of HDL.
    (Brischetto, 1983; Gluette Brown, 1986; Grasso,
    1986; Hojnacki, 1986).
    9.4.13 Allergic reactions
    No data available.
    9.4.14 Other clinical effects
    No data available.
    9.4.15 Special risks
    Pregnancy

    Nicotine in any form may be harmful to the fetus.
    Exposure to nicotine during the last trimester has been
    associated with a decrease in breathing movements.
    These effects may be the result of decreased placental
    perfusion caused by nicotine. One miscarriage during
    nicotine therapy has been reported. Studies of pregnant
    rhesus monkeys have shown that maternal nicotine
    administration produced acidosis, hypoxia and hypercarbia
    in the fetus. Nicotine has been shown to be teratogenic in
    mice treated cutaneously with 25 mg/kg, which is
    approximately 300 times the human oral dose. Studies in
    rats and monkeys have not demonstrated a teratogenic effect
    of nicotine in newborn which occur during cigarette smoking.
    Cigarette smoking is associated with impaired fetal growth
    and development.

    Breast feeding

    Nicotine passes freely into the breast milk in small
    quantities, which are not clinically significant,
    averaging 91ppb in one study. Heavy smoking (20-30
    cigarettes per day) may alter the supply of milk and
    cause nausea and vomiting in the infant.
    9.5 Others
    Withdrawal Syndrome. Need for oral gratification and other
    psychological problems may result in the production of
    symptoms of withdrawal including anxiety, impaired
    concentration and memory, depression, hostility, sleep
    disturbances, and increased appetite (Ellenhorn 1988).
    9.6 Summary
    10. MANAGEMENT
    10.1 General principles
    There is no known antidote. Immediate establishment of an

    airway, monitoring of breathing patterns, and maintenance of
    circulation are essential in serious overdose cases.
    Preparations for possible seizures of rapid progressing to
    coma must be initiated in serious overdose cases by
    establishment of an intravenous line, supplemental oxygen,
    cardiac monitoring, and direct observation.

    Artificial ventilation procedures should be kept ready;
    oxygen
    may be required.
    10.2 Relevant laboratory analyses and other investigations
    10.2.1 Sample collection
    Plasma
    10.2.2 Biomedical analysis
    Full blood count
    Urinalysis (glycosuria)
    10.2.3 Toxicological analysis
    Plasma nicotine levels and metabolites in urine.
    10.2.4 Other investigations
    No data available.
    10.3 Life supportive procedures and symptomatic treatment
    Artificial ventilation and oxygen therapy until spontaneous
    breathing is adequate. Keeps the airways clear.

    Profuse salivation may require continuous oral suction.
    Bronchial secretions, excess salivation, and diarrhoea may
    be
    ameliorated by atropine. If severe or persistent convulsions
    occur, they may be controlled with small intravenous doses
    of
    barbiturates or diazepam.
    10.4 Decontamination
    If contact was with the skin, remove contaminated clothing
    and wash the skin thoroughly with water without rubbing (avoid
    warm water). If the patient has swallowed nicotine, induce
    emesis if there are no convulsions and respiration is
    normal. Wash out the stomach. Activated charcoal may be left
    in the stomach.

    Children who ingest more than one cigarette should receive
    activated charcoal and medical observation for at least
    several hours.
    10.5 Elimination
    Haemodialysis and haemoperfusion have not been evaluated in
    acute nicotine poisoning. Acidification of urine may
    increase excretion of nicotine but although pharmacologically
    sound, its clinical value remains to be established and could be
    harmful.
    10.6 Antidote treatment
    10.6.1 Adults
    10.6.2 Children
    10.7 Management discussion
    11. ILLUSTRATIVE CASES
    11.1 Case reports from literature
    Malizia (1983) described four children who ingested two
    cigarettes each and developed salivation, vomiting,

    diarrhoea, tachypnoea, tachycardia, and hypotension within 30
    minutes and depressed respiration and cardiac arrhythmias within
    40 minutes. Convulsions occurred within 60 minutes of
    ingestion. All recovered after gastric lavage, activated
    charcoal, intermittent positive pressure ventilation, and 5
    mg diazepam intravenously for convulsions.

    A 23 year old woman who had smoked two packs per day for
    several years chewed a single piece of nicotine gum (2 mg
    nicotine) after which she developed nausea, tremor, flushing,

    palpitations, paresthesias, pruritus, vomiting, diarrhoea,
    confusion and abdominal pain. She recovered after treatment
    and with prochlorperazine, morphine and atropine (Mensch,
    1984).
    11.2 Internally extracted data on cases
    11.3 Internal cases
    12. ADDITIONAL INFORMATION
    12.1 Availability of antidotes
    No data available.
    12.2 Specific preventive measures
    Preventative measures for occupational exposure to nicotine
    include adequate ventilation, chemical goggles, mechanical
    filter respirator, rubber gloves, aprons and boots.
    12.3 Other
    No data available.
    13. REFERENCES
    eutical BArena J (1974). Poisoning IV Ed. New York Charles
    Thomas Ed.

    Bayer F et al (1985). The compartment of the contraction behavior
    of he left ventricle under nicotine exposition. Therapiewoche
    35:1968-74.

    Beck ER et al (1986). Bronchoconstriction and apnea induced by
    cigarette smoke: Nicotine dose dependence. Lung 164:293-301.

    Benowitz NL et al (1987). Prolonged absorption with development
    of tolerance to toxic effects after continuous exposure to nicotine.
    Clinical Pharmacology and Therapeutics 42(1):119-220

    Benowitz NL et al (1982a). Interindividual variability in the
    metabolism and cardiovascular effects of nicotine in man. J
    Pharmacol Exp Ther 221:368-372.

    Benowitz NL et al (1982b). Circadian blood nicotine
    concentrations during cigarette smoking. Clin Pharmacol Ther 32:758-764.

    Brischetto CS et al (1983). Plasma lipid and lipoprotein profiles
    of cigarette smokers from randomly selected families: Enhancement of
    hyperlipidemia and depression of high-density lipoprotein. Am J
    Cardiology 52(7):675-80.

    Cluette-Brown J et al (1986). Oral nicotine induces an
    atherogemic lipoprotein profile. Proceedings of the Society for Experimental
    Biology and Medicine 182(3):409-413.


    Ellenhorn MJ et al (1988). Medical Toxicology. Diagnostics and
    Treatment of Human Poisoning , 1 Ed. Elsevier Science Publishers,
    New York: 912-920.

    Feyerabend C et al (1985). Nicotine pharmacokinetics and its
    application to intake from smoking. Br J Clin Pharmacol 19:239-247

    Franke FE, Thomas JF (1936). The treatment of acute nicotine
    poisoning J Am Med Assoc 106:507.512

    Gehlbach SH et al (1974). Green-tobacco sickness. An illness of
    tobacco harvesters. J Am Med Assoc 229(14):1880-83.

    Gnasso A et al (1986). Acute influence of smoking on plasma
    lipoproteins. Proceedings of the Society for Experimental Biology
    and Medicine 182:414-418.

    Gosselin RE (1988). Clinical toxicology of Commercial Products.
    VI.ed Baltimore, Williams & Wilkins: 311-313.

    Hojnacki et al (1986). Oral nicotine impairs clearance of plasma
    low density lipoprotein. Proceeding of the Society for Experimental
    Biology and Medicine 1823):414-418.

    Kikendall JW et al (1984). Effect of cigarette smoking on
    gastrointestinal physiology and non-neoplasic digestive disease.
    J Clin Gastroenterology 61:65-79.

    Kontureck SJ et al (1971). Effects of nicotine on gastric
    secretion and ulcer formation in cats. Proceedings of the Society for
    Experimental Biology and Medicine 138, 2:674-677.

    Lockhart LP (1933). Nicotine poisoning (letter). Br Med J 1:246-247

    Malizia E et al (1983). Acute intoxication with nicotine
    alkaloids and cannabinoids in children from ingestion of cigarettes. Hum
    Toxicol 2:315-316.

    Maonad J et al (1984). Diffuse or segmental narrowing (spasm) of
    the coronary arteries during smoking demonstrated on angiography. Am
    J Cardiology 53:354-355.

    Mensch AR, Hoden M (1984). Nicotine overdose after a single piece
    of nicotine gum. Chest 85:801-802

    PDR (1987) Physician's desk reference. 41st ed. Barnhart E. 1070-72

    Peters et al (1987). Electrophysiologic effects of cigarette
    smoking in patients with and without chronic beta-blocker therapy. Am J
    Cardiol 60:1078-1082.

    RTECS (1986) Registry of Toxic Effects of Chemical Substances
    NIOSH (vol 3A):3060-424.

    Russell MAH et al (1983). Br Med J 286:683.


    Sonnenfeld & Wennmalm (1980). Inhibition by nicotine of the
    formation of prostacyclin - like activity in rabbit and human vascular
    tissue. Br J Pharm (71):609-613.

    US Department of Health and Human Services (1988). A Report of
    the Surgeon General, The Health consequences of smoking. Nicotine
    addiction. US Department of Health and Human Services, Public
    Healtch Service. Office of the Assistant Secretary for Health, Office
    on Smoking and Health 32-33: 601-602.

    Weizenecker & Deal WB (1970). Tobacco croppers sickness. J
    Florida Med Assoc, 57(12): 13-14.

    Yamatake Y et al (1978). Drug responses of canine, bronchus and
    bronchiole. Chemical and Pharmaculletin 26:318-320
    14. AUTHOR(S), REVIEWER(S), DATE(S) (INCLUDING UPDATES), COMPLETE
    ADDRESSES
    Author: Julia Higa de Landoni
    Section of Toxicology
    Hospital de Clinicas San Martin
    Cordoba 2351
    Capital Federal
    Buenos Aires
    Argentina

    Date: March 1991

    Peer Review: Adelaide, April 1991
    Congrats to BJ_M for holding what I am sure is the record for the longest OT post !!
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  7. Nicotine was the active ingredient in Rat Poison during the early part of the 20th century. It is famous for its use as an assassination drug amongst the so called "80 percent men" during the 40ies in Germany. So called, as they demanded 80% interest on black market loans.

    The Oil of Tobacco Poison was often mixed with beer or as an additive
    to benzine hypo's (a common injection peddled during the time)
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