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PLANTS-COLCHICINE

Classification   |    Detailed evidence-based information

Therapeutic Toxic Class

    A) This management includes those plants thought to contain the alkaloid colchicine.

Specific Substances

    A) Gloriosa superba (Glory Lily)
    1) Colchicum autumnale (Autumn Crocus)
    2) Autumn crocus
    3) Meadow saffron
    4) Naked lady
    5) Son-before-the-father
    6) Wild saffron
    7) COLCHICINE (PLANT)

Available Forms Sources

    A) SOURCES
    1) PLANTS CONTAINING COLCHICINE include Autumn Crocus or Meadow Saffron (Colchicum autumnale) and Glory Lilly (Gloriosa superba). The Glory Lilly may be cultivated in the United States and occurs naturally in tropical Asia and Africa.
    a) COLCHICUM AUTUMNALE: The seeds contain up to 0.2% to 0.8% colchicine, the corm 0.3% to 0.6%, flowers 0.1% (Tyler et al, 1988; Derivaux & Liegeois, 1962). Drying does NOT detoxify the plants (Chareyre et al, 1989).
    b) A fatality was reported in an adult who inadvertently ingested Colchicum Autumnale thought to be Allium victorialis platyphyllum, which have similar physical characteristics. Death occurred 4 days after ingestion (Sannohe et al, 2002).
    c) GLORIOSA SUPERBA: The tubers contain an estimated 6 mg per 10 grams of tuber of colchicine along with gloriosine, a related alkaloid (Gooneratne, 1966; Dunuwille et al, 1968). Nagarantnam et al (1973) reported 6 fatalities after ingestion of G. superba tubers. The patients died 1 to 8 days postingestion.
    B) USES
    1) Plant extracts have been used for treatment of podagra or gouty arthritis (Brncic et al, 2001).

Life Support

    A) This overview assumes that basic life support measures have been instituted.

Clinical Effects

    0.2.1) SUMMARY OF EXPOSURE
    A) USES: Plants containing colchicine include the autumn crocus or meadow saffron (Colchicum autumnale) and glory lily (Gloriosa superba). The glory lily may be cultivated in the United States and occurs naturally in tropical Asia and Africa. Plant extracts of these colchicine containing plants have been used for the treatment of podagra or gouty arthritis.
    B) PHARMACOLOGY: Colchicine binds to tubulin, a main component of microtubules, and causes cytoskeletal changes. Its anti-inflammatory properties are due to inhibiting the migration of leukocytes and proinflammatory cytokines into affected tissues. Finally, it inhibits uric acid crystal deposition in gout.
    C) TOXICOLOGY: Colchicine, a cytotoxic alkaloid, inhibits mitosis of dividing cells and functions as a microtubule or spindle poison. It functions like a chemotherapeutic and preferentially affects rapidly dividing cells. In high concentrations it is a general cellular poison.
    D) EPIDEMIOLOGY: Poisonings are rare, but can cause significant morbidity and mortality.
    E) WITH THERAPEUTIC USE
    1) ADVERSE EFFECTS: At therapeutic doses, GI symptoms (ie, nausea, vomiting, diarrhea, and abdominal pain) are commonly seen. Less frequently alopecia and anorexia can develop. Other events that are infrequently reported include: agranulocytosis, aplastic anemia, dysrhythmias, bone marrow suppression, hepatotoxicity, myopathy, peripheral neuritis, and rash.
    F) WITH POISONING/EXPOSURE
    1) OVERDOSE: Mild overdose causes mainly nausea, vomiting, diarrhea, and abdominal pain. Severe overdose cause clinical findings in 3 phases but may be delayed for a few hours:
    a) EARLY PHASE (0 to 24 hours): Consists of severe gastrointestinal symptoms (ie, nausea, vomiting, abdominal pain, hemorrhagic gastroenteritis) with resulting electrolyte abnormalities, volume depletion, and hypotension.
    b) SECOND PHASE (1 to 7 days): Multiorgan system failure: Possible risk of sudden cardiac death, dysrhythmias, confusion, coma, seizures, pancytopenia, renal failure, hepatic failure, sepsis, ARDS, electrolyte imbalances, and rhabdomyolysis.
    c) THIRD PHASE (over 7 days): Recovery or death: Alopecia, myopathy, neuropathy, or myoneuropathy, rebound leukocytosis, death is usually caused by respiratory failure, intractable shock, dysrhythmias, and cardiovascular collapse.
    2) FACTORS ASSOCIATED WITH POOR PROGNOSIS: Large dose; increased PT; WBC greater than 18K within 24 hours of ingestion; cardiogenic shock within 72 hours.
    0.2.3) VITAL SIGNS
    A) WITH POISONING/EXPOSURE
    1) Hypotension and tachycardia are common early findings in severe overdose. Fever or hypothermia may occur.

Laboratory Monitoring

    A) There have been reports of measuring colchicine plasma, serum and urine concentrations. However, these laboratory studies are unlikely to have a turnaround time to be clinically useful.
    B) Laboratory and other study evaluations should be based on the patient's signs and symptoms.
    C) Monitor vital signs and fluid status. Obtain serum electrolytes, CBC, and renal and liver functions tests as indicated. .

Treatment Overview

    0.4.2) ORAL/PARENTERAL EXPOSURE
    A) MANAGEMENT OF MILD TO MODERATE TOXICITY
    1) Treatment is symptomatic and supportive. Signs of toxicity follow a predictable course, requiring early recognition and aggressive supportive care. Patients may initially be asymptomatic; symptoms may be delayed for several hours after exposure. Carefully monitor airway, circulation and CNS function. Analgesics or opiates with or without an anticholinergic agent may be used to control severe abdominal pain, watch for possible toxic ileus. For mild to moderate overdose, consider GI decontamination and treat for shock. Monitor vital signs. Hypotension may be observed during the early phase of toxicity. Administer IV fluids, antiemetics, and vasopressors as needed. Treat seizures initially with benzodiazepines, add propofol or barbiturates if seizures persist.
    B) MANAGEMENT OF SEVERE TOXICITY
    1) Treatment is supportive in the ICU. Multiorgan system failure may occur 1 to 7 days post ingestion. Treat with IV fluids, vasopressors, cardiac monitoring, intubation, antibiotics for sepsis, G-CSF for pancytopenia, dialysis for acute renal failure as needed.
    C) DECONTAMINATION
    1) PREHOSPITAL: A patient may develop severe vomiting following ingestion. Consider activated charcoal if vomiting is absent, the patient is alert, and the airway is supported.
    2) HOSPITAL: Gastric lavage may be useful if performed within 1 to 2 hours of ingestion and if vomiting is controlled. Administer activated charcoal and consider multidose activated charcoal due to enterohepatic recirculation.
    D) AIRWAY MANAGEMENT
    1) Airway management and support may be needed. Central nervous symptoms and ascending paralysis with respiratory involvement require aggressive supportive care including mechanical ventilation.
    E) ANTIDOTE
    1) Currently, there is no antidote. Historically, colchicine-specific antibodies were used in one overdose. They are not available in the US.
    F) ENHANCED ELIMINATION
    1) Hemodialysis does not remove colchicine because of its large volume of distribution and protein binding, but may be useful when acute renal failure develops.
    G) PATIENT DISPOSITION
    1) HOME CRITERIA: If there is any potential for the ingestion of a toxic dose, the patient should be referred to a healthcare facility. Home management is not indicated.
    2) OBSERVATION CRITERIA: Any symptomatic patient or one with an intentional ingestion should be sent to the hospital and observed. If no GI symptoms develop within 8 to 12 hours of ingestion, the patient may be discharged.
    3) ADMISSION CRITERIA: Any symptomatic patient with an intentional ingestion or suspected or known significant overdose should be admitted to the ICU.
    4) CONSULT CRITERIA: Consult a nephrologist, if acute renal failure develops or a hematologist if significant hematologic toxicity occurs.
    H) PITFALLS
    1) Failure to consider colchicine in the differential and its potential severity of toxicity.
    I) PHARMACOKINETICS
    1) After oral intake, colchicine is rapidly absorbed, though the antimitotic effects of colchicine reaches its maximum about 10 hours post ingestion. the highest concentrations of colchicine appear in the kidneys, spleen, liver and the intestinal tract. Colchicine also reaches high concentrations in circulating leukocytes, and small amounts can be found in the heart, brain and skeletal muscle. After oral administration of 1 mg in 10 volunteers, peak colchicine concentrations of 0.323 micrograms/dL were reported with peak levels occurring in 30 minutes in 4 subjects and at 2 hours in 4 others. Colchicine is 10 to 20% protein bound, though the protein binding is weak and reversible. The volume of distribution of colchicine is about 2L/kg in healthy patients and less in those with severe renal or hepatic disease. Colchicine is metabolized by deacetylation in the liver and both metabolites and unchanged drug are excreted into the bite. In addition, 14 to 40% is excreted unchanged as in the urine and 4 to 14% as metabolites within 48 hours in one study.
    J) PREDISPOSING CONDITIONS
    1) Substances that are metabolized via CPY3A4 (erythromycin, clarithromycin, and grapefruit juice) may prolong the effects of colchicine. Also, patients with extremes of age or underlying renal or hepatic disease may be more sensitive to colchicine toxicity.
    K) DIFFERENTIAL DIAGNOSIS
    1) Other medications or substances that can cause severe gastrointestinal distress, disease than can cause gastrointestinal distress initially, but can later cause pancytopenia and multiorgan system failure.

Range Of Toxicity

    A) TOXIC DOSE: Estimated fatal dose of pure colchicine is 7 to 60 mg. A colchicine content of tubers of Gloriosa superba is approximately 0.3%. A potentially lethal amount is contained in a few seeds of C autumnale, and in 2.5 to 5 g of G superba tubers. In adults, a patient survived after ingesting 40 flowers of the autumn crocus (estimated colchicine dose of 17.1 to 102.7 mg) though he did develop severe gastroenteritis and asthenia. However, in another case, a 21-year-old man ingested 10 autumn crocus flowers and died 64 hours later of multi-organ failure.

Hepatic

    3.9.2) CLINICAL EFFECTS
    A) LIVER ENZYMES ABNORMAL
    1) WITH POISONING/EXPOSURE
    a) Transient liver elevations in transaminase levels have been reported (Boisrame-Helms et al, 2015; Brvar et al, 2004; Flesch et al, 2002; Danel et al, 2001; Mendis, 1989).
    b) Elevated blood levels of hepatic enzymes has been reported two days after the accidental, ultimately fatal, ingestion of Colchicum autumnale (meadow saffron). Postmortem examination showed enlarged liver and spleen, and significant hemorrhagic necrosis around central hepatic veins. Hepatocytes revealed hydropic or microvesicular fatty change, and portal triads were sparely infiltrated by mononuclei (Sundov et al, 2005).
    c) CASE REPORT: Elevated liver enzyme levels were reported in a 43-year-old woman 2 days after unintentionally ingesting Colchicum autumnale. Viral hepatitis markers were negative and an abdominal ultrasonography was normal. Her liver enzyme levels gradually normalized within 18 days post ingestion (Gabrscek et al, 2004).
    B) HEPATIC FAILURE
    1) WITH POISONING/EXPOSURE
    a) Severe poisonings have resulted in liver failure. In one fatality, autopsy revealed widespread hepatic necrotic changes (Brncic et al, 2001).
    C) HYPERBILIRUBINEMIA
    1) WITH POISONING/EXPOSURE
    a) Hyperbilirubinemia (total bilirubin 50.7 mcmol/L; normal 1.7-20.5 mcmol/L) has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005).

Genitourinary

    3.10.2) CLINICAL EFFECTS
    A) ACUTE RENAL FAILURE SYNDROME
    1) WITH POISONING/EXPOSURE
    a) Oliguria or anuria secondary to volume depletion is common (van Zoelen et al, 2002; Mendis, 1989; Nagaratnam et al, 1973). In one fatality, autopsy revealed widespread renal necrotic changes (Brncic et al, 2001).
    b) Elevated blood urea nitrogen (18.1 mmol/L; normal 2.5-8.3 mmol/L) and creatinine (295 mcmol/L; normal 54.2 to 116.0 mcmol/L) have been reported two days after the accidental, ultimately fatal, ingestion of Colchicum autumnale (meadow saffron). Postmortem examination of the patient revealed acute tubular necrosis without myoglobin or other casts in the kidneys (Sundov et al, 2005).
    c) CASE REPORT: A 76-year-old man developed anuria approximately 4 days after unintentionally ingesting 2 whole plants of Colchicum autumnale. Laboratory data revealed a peak serum creatinine level of 524 mcmol/L (normal value less than 133 mcmol/L). The patient's clinical condition continued to deteriorate, resulting in fatal cardiac arrest approximately 3 days post ingestion. An autopsy revealed kidney necrosis (Brvar et al, 2004a).
    d) CASE REPORT: A 43-year-old woman developed renal insufficiency following unintentional ingestion of Colchicum autumnale. Laboratory findings, obtained approximately 2 days post ingestion, showed a serum creatinine level of 224 mcmol/L (normal 44 to 97 mcmol/L) and a urea level of 20.4 mmol/L (normal 2.8 to 7.5 mmol/L). Her laboratory values normalized with supportive care; however, on hospital day 6 (approximately 8 days post ingestion), she developed tubular dysfunction with proteinuria initially, hyponatremia (122 mmol/L {normal 135 to 145 mmol/L}), hypophosphatemia (0.67 mmol/L {normal 0.80 to 1.4 mmol/L}), and polyuria. The patient gradually recovered and was discharged on hospital day 17 (approximately 19 days post ingestion) (Gabrscek et al, 2004).
    B) ALBUMINURIA
    1) WITH POISONING/EXPOSURE
    a) Proteinuria and mild hematuria have been reported after ingestion of plants containing colchicine alkaloids (Brncic et al, 2001; Mendis, 1989).

Summary Of Exposure

    A) USES: Plants containing colchicine include the autumn crocus or meadow saffron (Colchicum autumnale) and glory lily (Gloriosa superba). The glory lily may be cultivated in the United States and occurs naturally in tropical Asia and Africa. Plant extracts of these colchicine containing plants have been used for the treatment of podagra or gouty arthritis.
    B) PHARMACOLOGY: Colchicine binds to tubulin, a main component of microtubules, and causes cytoskeletal changes. Its anti-inflammatory properties are due to inhibiting the migration of leukocytes and proinflammatory cytokines into affected tissues. Finally, it inhibits uric acid crystal deposition in gout.
    C) TOXICOLOGY: Colchicine, a cytotoxic alkaloid, inhibits mitosis of dividing cells and functions as a microtubule or spindle poison. It functions like a chemotherapeutic and preferentially affects rapidly dividing cells. In high concentrations it is a general cellular poison.
    D) EPIDEMIOLOGY: Poisonings are rare, but can cause significant morbidity and mortality.
    E) WITH THERAPEUTIC USE
    1) ADVERSE EFFECTS: At therapeutic doses, GI symptoms (ie, nausea, vomiting, diarrhea, and abdominal pain) are commonly seen. Less frequently alopecia and anorexia can develop. Other events that are infrequently reported include: agranulocytosis, aplastic anemia, dysrhythmias, bone marrow suppression, hepatotoxicity, myopathy, peripheral neuritis, and rash.
    F) WITH POISONING/EXPOSURE
    1) OVERDOSE: Mild overdose causes mainly nausea, vomiting, diarrhea, and abdominal pain. Severe overdose cause clinical findings in 3 phases but may be delayed for a few hours:
    a) EARLY PHASE (0 to 24 hours): Consists of severe gastrointestinal symptoms (ie, nausea, vomiting, abdominal pain, hemorrhagic gastroenteritis) with resulting electrolyte abnormalities, volume depletion, and hypotension.
    b) SECOND PHASE (1 to 7 days): Multiorgan system failure: Possible risk of sudden cardiac death, dysrhythmias, confusion, coma, seizures, pancytopenia, renal failure, hepatic failure, sepsis, ARDS, electrolyte imbalances, and rhabdomyolysis.
    c) THIRD PHASE (over 7 days): Recovery or death: Alopecia, myopathy, neuropathy, or myoneuropathy, rebound leukocytosis, death is usually caused by respiratory failure, intractable shock, dysrhythmias, and cardiovascular collapse.
    2) FACTORS ASSOCIATED WITH POOR PROGNOSIS: Large dose; increased PT; WBC greater than 18K within 24 hours of ingestion; cardiogenic shock within 72 hours.

Vital Signs

    3.3.1) SUMMARY
    A) WITH POISONING/EXPOSURE
    1) Hypotension and tachycardia are common early findings in severe overdose. Fever or hypothermia may occur.
    3.3.3) TEMPERATURE
    A) WITH POISONING/EXPOSURE
    1) HYPERTHERMIA has been reported after ingestion of Gloriosa superba tubers and Colchicum autumnale plant parts (Brvar et al, 2004a; Flesch et al, 2002; Nagaratnam et al, 1973). Recovery, following the second phase of colchicine poisoning, may be accompanied by fever (van Zoelen et al, 2002).
    a) INCIDENCE: In a series of 49 patients with Gloriosa superba intoxication, 1 (2%) developed fever (Fernando & Fernando, 1990).
    2) Fever has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005).
    3) Hypothermia has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005).
    3.3.4) BLOOD PRESSURE
    A) WITH POISONING/EXPOSURE
    1) HYPOTENSION
    a) Hypotension has been reported in children after ingestion of Gloriosa superba (Aleem, 1992). It may be due to loss of fluid into the extravascular space and possibly contributory direct myocardial toxicity. Hypotension has also been reported in adults within 3 days following a toxic ingestion of plants containing colchicine alkaloids (Flesch et al, 2002; van Zoelen et al, 2002; Brncic et al, 2001).
    b) Hypotension has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005).
    c) Hypotension, unresponsive to hydration and norepinephrine administration, occurred in a 76-year-old man who unintentionally ingested Colchicum autumnale. The patient's clinical condition continued to deteriorate, resulting in fatal cardiac arrest 3 days post-ingestion (Brvar et al, 2004a).
    3.3.5) PULSE
    A) WITH POISONING/EXPOSURE
    1) TACHYCARDIA
    a) Reflex tachycardia is also common (van Zoelen et al, 2002; Brncic et al, 2001; Naidus et al, 1977; Nagaratnam et al, 1973; Gooneratne, 1966).
    b) Tachycardia has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005).
    c) Sinus tachycardia (122 bpm) was reported in a 76-year-old man who unintentionally ingested 2 whole plants of Colchicum autumnale (Brvar et al, 2004a).

Acid-Base

    3.11.2) CLINICAL EFFECTS
    A) ACIDOSIS
    1) WITH POISONING/EXPOSURE
    a) Severe acidosis, refractory to sodium bicarbonate infusions, has been reported in severe cases (Brvar et al, 2004a; van Zoelen et al, 2002; Brncic et al, 2001).

Hematologic

    3.13.2) CLINICAL EFFECTS
    A) MYELOSUPPRESSION
    1) WITH POISONING/EXPOSURE
    a) In response to the antimitotic effect of colchicine, bone marrow depression may occur on the 3rd or 4th day following exposure; anemia, leukopenia and thrombocytopenia may occur (Premaratna et al, 2015; Boisrame-Helms et al, 2015; Sundov et al, 2005; Brvar et al, 2004; Gabrscek et al, 2004; Flesch et al, 2002; Brncic et al, 2001; Mendis, 1989).
    b) Polymicrobial infection may result.
    B) BLOOD COAGULATION PATHWAY FINDING
    1) WITH POISONING/EXPOSURE
    a) Elevated prothrombin time and activated partial thromboplastin time may develop.
    b) CASE REPORT: A 29-year-old man developed anemia, thrombocytopenia, leukopenia, a prolonged prothrombin time, bleeding time and clotting time 5 days after ingesting tubers of Gloriosa superba (Mendis, 1989).
    1) At the same time he developed bleeding gums, subconjunctival hemorrhages, and hematuria (Mendis, 1989).
    c) Prolonged prothrombin time and thrombocytopenia (platelets 10 x 10(9)/L; normal 130-400 x 10(9)/L) have been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005)
    d) CASE REPORT: An elevated INR (1.9; normal 1.2), anemia (3.3 x 10(12)/L; normal 4.15 to 4.90 x 10(12)/L), and thrombocytopenia (51 x 10(9)/L; normal 130 to 400 x 10(9)/L) were reported in a 76-year-old man who unintentionally ingested 2 whole Colchicum autumnale plants. The patient's clinical condition continued to deteriorate, with the development of multi-organ failure, resulting in fatal cardiac arrest. An autopsy revealed hypocellular bone marrow with diserythropoiesis, dismyeloiesis, and dismegacaryopoiesis (Brvar et al, 2004a).
    C) LEUKOCYTOSIS
    1) WITH POISONING/EXPOSURE
    a) Patients surviving the second phase of poisoning (multi-organ failure), often develop leukocytosis accompanying recovery (Brvar et al, 2004; van Zoelen et al, 2002).
    D) LEUKOPENIA
    1) WITH POISONING/EXPOSURE
    a) Leukocytopenia (leukocytes 0.7 x 10(9)/L; normal 4-10 x 10(9)/L) has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005)

Dermatologic

    3.14.2) CLINICAL EFFECTS
    A) ALOPECIA
    1) WITH POISONING/EXPOSURE
    a) Alopecia, accompanying the recovery stage, usually develops 2 to 3 weeks post ingestion with eventual regrowth of hair (Boisrame-Helms et al, 2015; Gooneratne et al, 2014; Brvar et al, 2004; Flesch et al, 2002; van Zoelen et al, 2002; Gooneratne, 1966). In one case, alopecia developed 5 days post ingestion and persisted for 15 days (Flesch et al, 2002). In another case, total alopecia occurred within 14 days in a young adult following intentional ingestion of two tubers of Gloriosa superba; partial regrowth was noted one month after exposure (Premaratna et al, 2015).
    b) CASE REPORT: A 43-year-old woman experienced total alopecia approximately 5 days after unintentionally ingesting Colchicum autumnale. During this time, the patient also developed myelosuppression, acute renal failure, and elevated hepatic enzyme levels. After 3 years post ingestion, the patient continued to experience intermittent episodes of hair loss, despite resolution of her other signs and symptoms of acute colchicine poisoning (Gabrscek et al, 2004).

Musculoskeletal

    3.15.2) CLINICAL EFFECTS
    A) RHABDOMYOLYSIS
    1) WITH POISONING/EXPOSURE
    a) Increase in creatine kinase (CK) is consistent with colchicine poisoning (Boisrame-Helms et al, 2015; Flesch et al, 2002).
    b) Elevated creatine kinase (10,120 Units/L; normal 15 to 130 Units/L) has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005).
    c) CASE REPORT: Elevated creatine kinase and myoglobin levels (19 mckat/L and 3696 mcg/L, respectively) were reported in a 76-year-old man who unintentionally ingested 2 whole plants of Colchicum autumnale. The patient's clinical condition continued to deteriorate, resulting in asystolic cardiac arrest with unsuccessful resuscitation approximately 3 days post ingestion (Brvar et al, 2004a).
    B) MUSCLE WEAKNESS
    1) WITH POISONING/EXPOSURE
    a) CASE REPORT: A 43-year-old woman complained of muscle weakness 12 to 24 weeks following unintentional ingestion of Colchicum autumnale. The muscle weakness continued to persist 3 years post ingestion, although her creatine kinase levels were normal (Gabrscek et al, 2004).

Endocrine

    3.16.2) CLINICAL EFFECTS
    A) HYPOGLYCEMIA
    1) WITH POISONING/EXPOSURE
    a) Low serum glucose levels may occur following toxic plant ingestions (Brncic et al, 2001).
    B) HYPERGLYCEMIA
    1) WITH POISONING/EXPOSURE
    a) Hyperglycemia, lasting for 2 months following colchicine plant poisoning, was reported in one adult case (Flesch et al, 2002).
    b) An elevated blood sugar of 280 mg/dL was reported in an adult with colchicine poisoning (Sannohe et al, 2002).
    C) HYPOCALCEMIA
    1) WITH POISONING/EXPOSURE
    a) An adult developed hypocalcemia about 5 days after intentionally ingesting Gloriosa superba tubers. Serum calcium was 0.9 mmol/L (normal 1.1 to 1.4). Her clinical course was further complicated by seizure activity and neurologic toxicity. Other laboratory studies were within normal limits except for mildly elevated liver enzymes. She gradually improved with anticonvulsant and IV calcium therapy (Gooneratne et al, 2014).

Heent

    3.4.3) EYES
    A) WITH POISONING/EXPOSURE
    1) BLURRED VISION: In a series of 49 patients with Gloriosa superba intoxication, 2 (4%) developed blurred vision (Fernando & Fernando, 1990).
    3.4.6) THROAT
    A) WITH POISONING/EXPOSURE
    1) BURNING: A burning sensation of the mouth and throat may be noted (Mendis, 1989).

Cardiovascular

    3.5.2) CLINICAL EFFECTS
    A) HYPOTENSIVE EPISODE
    1) WITH POISONING/EXPOSURE
    a) Hypotension has been reported in children after ingestion of Gloriosa superba (Aleem, 1992). It may be due to loss of fluid into the extravascular space and possibly contributory direct myocardial toxicity. Hypotension has also been reported in adults within 3 days following a toxic ingestion of plants containing colchicine alkaloids (Flesch et al, 2002; van Zoelen et al, 2002; Brncic et al, 2001).
    b) SHOCK: Volume depletion secondary to the severe gastrointestinal symptoms may lead to fatal shock (Nagaratnam et al, 1973). Severe refractory hypotension resulting in cardiovascular collapse and death has been reported in an adult with multiorgan failure due to Colchicum autumnale poisoning (Brncic et al, 2001).
    c) Hypotension has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron/autumn crocus) (Sundov et al, 2005; Gabrscek et al, 2004).
    d) Hypotension, unresponsive to hydration and norepinephrine administration, occurred in a 76-year-old man who unintentionally ingested 2 whole Colchicum autumnale plants. The patient's clinical condition continued to deteriorate, and he died approximately 3 days post ingestion (Brvar et al, 2004a).
    B) CARDIOGENIC SHOCK
    1) WITH POISONING/EXPOSURE
    a) CASE REPORT: A 68-year-old woman inadvertently ingested C. autumnale mistaking the plant for wild leeks. Several days after exposure, the patient developed severe shock and multi-organ failure and was admitted to an ICU setting. Laboratory studies showed evidence of numerous clinical events including pancytopenia (requiring blood products), acute liver and renal failure, rhabdomyolysis, severe metabolic acidosis, and cardiac failure. A peak colchicine (10 ng/mL; therapeutic range, 0.6 mg/dL) plasma concentration was reached on day 4. Cardiogenic shock was initially treated with dobutamine (10 mcg/kg/min) and close hemodynamic monitoring including Swan-Ganz and echocardiography. A transthoracic echocardiography revealed global hypokinesia with a left ventricular ejection fraction of 5% to 10%, severe right ventricular dysfunction with moderate tricuspid regurgitation. However, despite these efforts hemodynamic instability persisted and the patient was started on extracorporeal life support (ECLS) at a rate of 3.5 L/min and 3800 rev/min. Gradually, her cardiac function improved and ECLS was removed on day 10. Ongoing clinical complications included sudden arrhythmias with third-degree atrioventricular block on day 12 with cardiac arrest that was treated successfully with resuscitation. Persistent renal failure required intermittent hemodialysis until day 23 and mechanical ventilation was needed until day 20. By day 24, the patient had completely recovered from multi-organ failure and was discharged to home with no permanent sequelae (Boisrame-Helms et al, 2015).
    C) ELECTROCARDIOGRAM ABNORMAL
    1) WITH POISONING/EXPOSURE
    a) Severe chest pain associated with ST elevations was seen on days 3 to 5 after ingestion of Gloriosa superba tubers. The patient showed clinical features of acute left ventricular failure (Mendis, 1989).
    b) In a case of Colchicum autumnale ingestion, T wave inversion was seen on ECG in an adult (Flesch et al, 2002).
    c) CASE REPORT: A prolonged QTc interval (467 ms) was reported in a 43-year-old woman 2 days after unintentionally ingesting Colchicum autumnale (Gabrscek et al, 2004).
    D) TACHYARRHYTHMIA
    1) WITH POISONING/EXPOSURE
    a) Reflex tachycardia is also common (van Zoelen et al, 2002; Brncic et al, 2001; Naidus et al, 1977; Nagaratnam et al, 1973; Gooneratne, 1966).
    b) Tachycardia has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005).
    c) CASE REPORT: Episodes of bradycardia and junctional tachycardia were reported in a 71-year-old woman who unintentionally ingested Colchicum autumnale (autumn crocus) (Brvar et al, 2004).
    d) CASE REPORT: Sinus tachycardia (122 bpm) was reported in a 76-year-old man who unintentionally ingested 2 whole plants of Colchicum autumnale (Brvar et al, 2004a).
    E) BRADYCARDIA
    1) WITH POISONING/EXPOSURE
    a) Bradycardia has been reported in children after ingestion of Gloriosa superba (Aleem, 1992).
    b) CASE REPORT: Episodes of bradycardia and junctional tachycardia were reported in a 71-year-old woman who unintentionally ingested Colchicum autumnale (autumn crocus) (Brvar et al, 2004).
    F) CHEST PAIN
    1) WITH POISONING/EXPOSURE
    a) In a series of 49 patients with Gloriosa superba intoxication, 8 (16%) developed chest pain (Fernando & Fernando, 1990).
    G) CARDIOMYOPATHY
    1) WITH POISONING/EXPOSURE
    a) CASE REPORT: An echocardiogram showed heart dilatation with an ejection fraction of less than 30% in a 76-year-old man 2 days after he unintentionally ingested 2 whole Colchicum autumnale plants. The ECG revealed diffuse nonspecific ST changes, and troponin I levels were elevated, indicating myocardial necrosis. The patient's clinical condition continued to deteriorate, resulting in fatal cardiac arrest approximately 3 days post-ingestion. An autopsy showed heart dilatation (Brvar et al, 2004a).

Respiratory

    3.6.2) CLINICAL EFFECTS
    A) ACUTE LUNG INJURY
    1) WITH POISONING/EXPOSURE
    a) Acute respiratory failure, requiring intubation and assisted mechanical ventilation, may occur in severe cases (Boisrame-Helms et al, 2015; van Zoelen et al, 2002; Brncic et al, 2001). Respiratory arrest is frequently the terminal event in fatal cases (Nagaratnam et al, 1973).
    b) CASE REPORT: A 39-year-old man developed a sudden onset of severe dyspnea and respiratory distress progressing to apnea approximately 30 hours after inadvertently ingesting Colchicum persicum thought to be wild garlic. Despite immediate oxygenation, mechanical ventilation and cardiopulmonary resuscitation, the patient did not respond to resuscitation efforts and died of cardiopulmonary arrest. Postmortem examination showed pulmonary edema and congestion and the plant ingested was confirmed to be C. persicum (Amrollahi-Sharifabadi et al, 2013).
    c) CASE REPORT: A 76-year-old man developed acute respiratory failure, necessitating mechanical ventilation, 2 days after unintentionally ingesting Colchicum autumnale. The patient's condition continued to deteriorate, with the development of multiorgan system failure. He died 3 days post ingestion. An autopsy revealed pulmonary edema and bilateral bronchopneumonia (Brvar et al, 2004a).
    B) DYSPNEA
    1) WITH POISONING/EXPOSURE
    a) Mendis (1989) reported dyspnea, along with cardiotoxicity, in a patient who had ingested Gloriosa superba tubers(Mendis, 1989).
    C) TACHYPNEA
    1) WITH POISONING/EXPOSURE
    a) Tachypnea has been reported two days after the accidental ingestion of Colchicum autumnale (meadow saffron) (Sundov et al, 2005).

Neurologic

    3.7.2) CLINICAL EFFECTS
    A) SEIZURE
    1) WITH POISONING/EXPOSURE
    a) SUMMARY: Seizures have been reported in children after ingestion of Gloriosa superba (Aleem, 1992) and following overdose in an adult (Gooneratne et al, 2014).
    b) CASE REPORT: A 28-year-old woman intentionally ingested Gloriosa superba tubers and 6 hours later she had profuse vomiting, diarrhea and abdominal pain. Upon admission, she was alert and decontaminated with activated charcoal. She was progressing well until day 5 when she developed generalized tonic-clonic seizures and hypocalcemia was also noted (calcium 0.9 mmol/L (1.1 to 1.4). By day 7, her level of consciousness declined with a Glasgow coma scale score of 6/15. Laboratory studies were within normal limits with the exception of mildly elevated liver enzymes. Diagnostic studies, including a CT scan of the head and lumbar puncture, were negative. A serological work-up was also negative. An EEG detected bilateral diffuse slow waves that were suggestive of encephalopathy. In addition, a MR brain scan showed T2 hyper intensities in the caudate and lentiform nuclei of the basal ganglia that are consistent with toxic encephalopathy; the thalamic regions were unaffected. With supportive care, her neurologic function improved (Glasgow coma scale score 11/15) in about 2 weeks and she remained clinically stable (Gooneratne et al, 2014).
    c) LACK OF EFFECT: In a series of 6 fatal cases of Gloriosa superba intoxication, there were no neurologic manifestations (Nagaratnam et al, 1973).
    B) PARALYSIS
    1) WITH POISONING/EXPOSURE
    a) Ascending paralysis (polyneuropathy) has been reported with Gloriosa superba overdose (Agunawela & Fernando, 1971).
    C) CENTRAL NERVOUS SYSTEM FINDING
    1) WITH POISONING/EXPOSURE
    a) General weakness, confusion, agitation, and hallucinations have been reported 2 to 8 days after the accidental ingestion of Colchicum autumnale (meadow saffron/autumn crocus) (Sundov et al, 2005; Gabrscek et al, 2004).

Gastrointestinal

    3.8.2) CLINICAL EFFECTS
    A) PARESTHESIA
    1) WITH POISONING/EXPOSURE
    a) Ingestion often causes numbness of the lips, tongue, and throat. An intense thirst and a burning in the mouth and throat may occur (Mendis, 1989).
    B) GASTROENTERITIS
    1) WITH POISONING/EXPOSURE
    a) Within 2 to 12 hours, nausea, vomiting, diarrhea, dysphagia, and severe abdominal cramps develop. These symptoms may persist for 10 to 15 days (Premaratna et al, 2015; Boisrame-Helms et al, 2015; Gooneratne et al, 2014; Sannohe et al, 2002; Sundov et al, 2005; Flesch et al, 2002; van Zoelen et al, 2002; Brncic et al, 2001; Danel et al, 2001; Nagaratnam et al, 1973).
    b) INCIDENCE: In a series of 49 patients with Gloriosa superba poisoning 2 (4%) developed nausea, 27 (54%) had vomiting, 11 (22%) developed diarrhea and 20 (40%) complained of abdominal pain (Fernando & Fernando, 1990).
    c) Abdominal pain, nausea and vomiting, and watery diarrhea have been reported several hours after the accidental ingestion of Colchicum autumnale (meadow saffron/autumn crocus) (Sundov et al, 2005; Brvar et al, 2004; Brvar et al, 2004a; Gabrscek et al, 2004).
    C) PANCREATITIS
    1) WITH POISONING/EXPOSURE
    a) CASE REPORT: Acute pancreatitis with elevated lipase levels was reported in a 71-year-old woman who unintentionally ingested Colchicum autumnale (autumn crocus). The lipase levels normalized with supportive care (Brvar et al, 2004).
    b) CASE REPORT: Elevated plasma lipase and amylase levels [15.1 ukat/L (normal 0 to 2.50 ukat/L) and 4.50 ukat/L (normal 0 to 2.50 ukat/L), respectively] were reported in a 43-year-old woman approximately 6 days after unintentionally ingesting Colchicum autumnale. The pancreatic enzyme levels normalized with supportive care (Gabrscek et al, 2004).

Immunologic

    3.19.2) CLINICAL EFFECTS
    A) SYSTEMIC INFECTION
    1) WITH POISONING/EXPOSURE
    a) Bacterial sepsis may occur later in the course of colchicine plant poisoning (Flesch et al, 2002).

Monitoring Parameters Levels

    4.1.1) SUMMARY
    A) There have been reports of measuring colchicine plasma, serum and urine concentrations. However, these laboratory studies are unlikely to have a turnaround time to be clinically useful.
    B) Laboratory and other study evaluations should be based on the patient's signs and symptoms.
    C) Monitor vital signs and fluid status. Obtain serum electrolytes, CBC, and renal and liver functions tests as indicated. .
    4.1.2) SERUM/BLOOD
    A) BLOOD/SERUM CHEMISTRY
    1) Blood levels and urine detection of colchicine are not readily available. Patients suffering from colchicine poisoning should be monitored for fluid and electrolyte balance and renal and liver function tests.
    B) HEMATOLOGIC
    1) Monitor CBC with differential and platelet count daily in symptomatic patients.

Methods

    A) CHROMATOGRAPHY
    1) Colchicine can be identified in urine using gas chromatography and mass spectrometry (Clevenger et al, 1991).
    2) Colchicine and demecolcine can be quantitated in raw and dried plant material by HPLC (Vicar et al, 1993).
    3) High-performance liquid chromatography-mass spectrometry has been described for the identification and quantification of colchicine in human serum following a toxic plant ingestion. A detection limit of 0.4 ng/mL was reported (Danel et al, 2001). HPLC was also able to detect colchicine in the bile of an adult who died following meadow saffron ingestion. Bile fluid appears to be a significant route of excretion for colchicine and its metabolites (Sannohe et al, 2002).
    B) MASS SPECTROMETRY
    1) High performance liquid chromatography/sonic spray ionization mass spectrometry (HPLC/SSI-MS) was used to detect colchicine following a fatal exposure (Sannohe et al, 2002).
    C) IMMUNOASSAY
    1) Radioimmunoassay and enzyme immunoassays have been developed with a measuring range of 0.1 to 100 ng colchicine for the radioimmunoassay and from 0.05 to 350 ng for the enzyme immunoassay with detection limits of 125 fmol and 25 fmol, respectively (Poulev et al, 1994).

Life Support

    A) Support respiratory and cardiovascular function.

Patient Disposition

    6.3.1) DISPOSITION/ORAL EXPOSURE
    6.3.1.1) ADMISSION CRITERIA/ORAL
    A) Any symptomatic patient with an intentional ingestion or suspected or known significant overdose should be admitted to the ICU.
    6.3.1.2) HOME CRITERIA/ORAL
    A) Home management is not indicated.
    6.3.1.3) CONSULT CRITERIA/ORAL
    A) Consult a nephrologist, if acute renal failure develops or a hematologist if significant hematologic toxicity occurs.
    6.3.1.5) OBSERVATION CRITERIA/ORAL
    A) Any symptomatic patient or one with an intentional ingestion should be sent to the hospital and observed. If no GI symptoms develop within 8 to 12 hours of ingestion, the patient may be discharged.

Monitoring

    A) There have been reports of measuring colchicine plasma, serum and urine concentrations. However, these laboratory studies are unlikely to have a turnaround time to be clinically useful.
    B) Laboratory and other study evaluations should be based on the patient's signs and symptoms.
    C) Monitor vital signs and fluid status. Obtain serum electrolytes, CBC, and renal and liver functions tests as indicated. .

Oral Exposure

    6.5.1) PREVENTION OF ABSORPTION/PREHOSPITAL
    A) SUMMARY
    1) Patient may develop severe vomiting following ingestion. Consider activated charcoal if vomiting is absent, the patient is alert, and the airway is supported.
    B) ACTIVATED CHARCOAL
    1) PREHOSPITAL ACTIVATED CHARCOAL ADMINISTRATION
    a) Consider prehospital administration of activated charcoal as an aqueous slurry in patients with a potentially toxic ingestion who are awake and able to protect their airway. Activated charcoal is most effective when administered within one hour of ingestion. Administration in the prehospital setting has the potential to significantly decrease the time from toxin ingestion to activated charcoal administration, although it has not been shown to affect outcome (Alaspaa et al, 2005; Thakore & Murphy, 2002; Spiller & Rogers, 2002).
    1) In patients who are at risk for the abrupt onset of seizures or mental status depression, activated charcoal should not be administered in the prehospital setting, due to the risk of aspiration in the event of spontaneous emesis.
    2) The addition of flavoring agents (cola drinks, chocolate milk, cherry syrup) to activated charcoal improves the palatability for children and may facilitate successful administration (Guenther Skokan et al, 2001; Dagnone et al, 2002).
    2) CHARCOAL DOSE
    a) Use a minimum of 240 milliliters of water per 30 grams charcoal (FDA, 1985). Optimum dose not established; usual dose is 25 to 100 grams in adults and adolescents; 25 to 50 grams in children aged 1 to 12 years (or 0.5 to 1 gram/kilogram body weight) ; and 0.5 to 1 gram/kilogram in infants up to 1 year old (Chyka et al, 2005).
    1) Routine use of a cathartic with activated charcoal is NOT recommended as there is no evidence that cathartics reduce drug absorption and cathartics are known to cause adverse effects such as nausea, vomiting, abdominal cramps, electrolyte imbalances and occasionally hypotension (None Listed, 2004).
    b) ADVERSE EFFECTS/CONTRAINDICATIONS
    1) Complications: emesis, aspiration (Chyka et al, 2005). Aspiration may be complicated by acute respiratory failure, ARDS, bronchiolitis obliterans or chronic lung disease (Golej et al, 2001; Graff et al, 2002; Pollack et al, 1981; Harris & Filandrinos, 1993; Elliot et al, 1989; Rau et al, 1988; Golej et al, 2001; Graff et al, 2002). Refer to the ACTIVATED CHARCOAL/TREATMENT management for further information.
    2) Contraindications: unprotected airway (increases risk/severity of aspiration) , nonfunctioning gastrointestinal tract, uncontrolled vomiting, and ingestion of most hydrocarbons (Chyka et al, 2005).
    C) DERMAL EXPOSURE
    1) DECONTAMINATION: Remove contaminated clothing and jewelry and place them in plastic bags. Wash exposed areas with soap and water for 10 to 15 minutes with gentle sponging to avoid skin breakdown. A physician may need to examine the area if irritation or pain persists (Burgess et al, 1999).
    D) EYE EXPOSURE
    1) DECONTAMINATION: Remove contact lenses and irrigate exposed eyes with copious amounts of room temperature 0.9% saline or water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist after 15 minutes of irrigation, the patient should be seen in a healthcare facility.
    6.5.2) PREVENTION OF ABSORPTION
    A) SUMMARY
    1) Administer activated charcoal and consider multidose activated charcoal due to enterohepatic recirculation.
    2) Gastric lavage may be useful if performed within 1 to 2 hours of ingestion and if vomiting is controlled.
    B) ACTIVATED CHARCOAL
    1) CHARCOAL ADMINISTRATION
    a) Consider administration of activated charcoal after a potentially toxic ingestion (Chyka et al, 2005). Administer charcoal as an aqueous slurry; most effective when administered within one hour of ingestion.
    2) CHARCOAL DOSE
    a) Use a minimum of 240 milliliters of water per 30 grams charcoal (FDA, 1985). Optimum dose not established; usual dose is 25 to 100 grams in adults and adolescents; 25 to 50 grams in children aged 1 to 12 years (or 0.5 to 1 gram/kilogram body weight) ; and 0.5 to 1 gram/kilogram in infants up to 1 year old (Chyka et al, 2005).
    1) Routine use of a cathartic with activated charcoal is NOT recommended as there is no evidence that cathartics reduce drug absorption and cathartics are known to cause adverse effects such as nausea, vomiting, abdominal cramps, electrolyte imbalances and occasionally hypotension (None Listed, 2004).
    b) ADVERSE EFFECTS/CONTRAINDICATIONS
    1) Complications: emesis, aspiration (Chyka et al, 2005). Aspiration may be complicated by acute respiratory failure, ARDS, bronchiolitis obliterans or chronic lung disease (Golej et al, 2001; Graff et al, 2002; Pollack et al, 1981; Harris & Filandrinos, 1993; Elliot et al, 1989; Rau et al, 1988; Golej et al, 2001; Graff et al, 2002). Refer to the ACTIVATED CHARCOAL/TREATMENT management for further information.
    2) Contraindications: unprotected airway (increases risk/severity of aspiration) , nonfunctioning gastrointestinal tract, uncontrolled vomiting, and ingestion of most hydrocarbons (Chyka et al, 2005).
    C) GASTRIC LAVAGE
    1) INDICATIONS: Consider gastric lavage with a large-bore orogastric tube (ADULT: 36 to 40 French or 30 English gauge tube {external diameter 12 to 13.3 mm}; CHILD: 24 to 28 French {diameter 7.8 to 9.3 mm}) after a potentially life threatening ingestion if it can be performed soon after ingestion (generally within 60 minutes).
    a) Consider lavage more than 60 minutes after ingestion of sustained-release formulations and substances known to form bezoars or concretions.
    2) PRECAUTIONS:
    a) SEIZURE CONTROL: Is mandatory prior to gastric lavage.
    b) AIRWAY PROTECTION: Place patients in the head down left lateral decubitus position, with suction available. Patients with depressed mental status should be intubated with a cuffed endotracheal tube prior to lavage.
    3) LAVAGE FLUID:
    a) Use small aliquots of liquid. Lavage with 200 to 300 milliliters warm tap water (preferably 38 degrees Celsius) or saline per wash (in older children or adults) and 10 milliliters/kilogram body weight of normal saline in young children(Vale et al, 2004) and repeat until lavage return is clear.
    b) The volume of lavage return should approximate amount of fluid given to avoid fluid-electrolyte imbalance.
    c) CAUTION: Water should be avoided in young children because of the risk of electrolyte imbalance and water intoxication. Warm fluids avoid the risk of hypothermia in very young children and the elderly.
    4) COMPLICATIONS:
    a) Complications of gastric lavage have included: aspiration pneumonia, hypoxia, hypercapnia, mechanical injury to the throat, esophagus, or stomach, fluid and electrolyte imbalance (Vale, 1997). Combative patients may be at greater risk for complications (Caravati et al, 2001).
    b) Gastric lavage can cause significant morbidity; it should NOT be performed routinely in all poisoned patients (Vale, 1997).
    5) CONTRAINDICATIONS:
    a) Loss of airway protective reflexes or decreased level of consciousness if patient is not intubated, following ingestion of corrosive substances, hydrocarbons (high aspiration potential), patients at risk of hemorrhage or gastrointestinal perforation, or trivial or non-toxic ingestion.
    D) MULTIPLE-DOSE ACTIVATED CHARCOAL
    1) Colchicine is believed to undergo enterohepatic recirculation (Thomas et al, 1989; Ferron et al, 1996). Multiple dose activated charcoal may interrupt enterohepatic recirculation, however, there is no clinical evidence that this decreases toxicity or improves outcome. Multiple dose activated charcoal should be considered in patients with potentially serious or lethal ingestions.
    2) MULTIPLE DOSE ACTIVATED CHARCOAL
    a) ADULT DOSE: Optimal dose not established. After an initial dose of 50 to 100 grams of activated charcoal, subsequent doses may be administered every 1, 2 or 4 hours at a dose equivalent to 12.5 grams/hour (Vale et al, 1999), do not exceed: 0.5 g/kg charcoal every 2 hours (Ghannoum & Gosselin, 2013; Mauro et al, 1994). There is some evidence that smaller more frequent doses are more effective at enhancing drug elimination than larger less frequent doses (Park et al, 1983; Ilkhanipour et al, 1992). PEDIATRIC DOSE: Optimal dose not established. After an initial dose of 25 to 50 grams in children aged 1 to 12 years (or 0.5 to 1 gram/kilogram body weight) (Chyka & Seger, 1997), subsequent doses may be administered every 1, 2 or 4 hours (Vale et al, 1999) in a dose equivalent to 6.25 grams/hour in children 1 to 12 years old.
    b) Activated charcoal should be continued until the patient's clinical and laboratory parameters, including drug concentrations if available, are improving (Vale et al, 1999). The patient should be frequently assessed for the ability to protect the airway and evidence of decreased peristalsis or intestinal obstruction.
    c) Use of cathartics has not been shown to increase drug elimination and may increase the likelihood of vomiting. Routine coadministration of a cathartic is NOT recommended (Vale et al, 1999).
    d) AGENTS AMENABLE TO MDAC THERAPY: The following properties of a drug that are likely to allow MDAC therapy to be effective include: small volume of distribution, low protein binding, prolonged half-life, low intrinsic clearance, and a nonionized state at physiologic pH (Chyka, 1995; Ghannoum & Gosselin, 2013).
    e) Vomiting is a common adverse effect; antiemetics may be necessary.
    f) CONTRAINDICATIONS: Absolute contraindications include an unprotected airway, intestinal obstruction, a gastrointestinal tract that is not intact and agents that may increase the risk of aspiration (eg, hydrocarbons). Relative contraindications include decreased peristalsis (eg, decreased bowel sounds, abdominal distention, ileus, severe constipation) (Vale et al, 1999; Mauro et al, 1994).
    g) COMPLICATIONS: Include constipation, intestinal bleeding, bowel obstruction, appendicitis, charcoal bezoars, and aspiration which may be complicated by acute respiratory failure, adult respiratory distress syndrome or bronchiolitis obliterans (Ghannoum & Gosselin, 2013; Ray et al, 1988; Atkinson et al, 1992; Gomez et al, 1994; Mizutani et al, 1991; Pollack et al, 1981; Harris & Filandrinos, 1993; Elliot et al, 1989; Mina et al, 2002; Harsch, 1986; Rau et al, 1988; Golej et al, 2001; Graff et al, 2002).
    6.5.3) TREATMENT
    A) SUPPORT
    1) MANAGEMENT OF MILD TO MODERATE TOXICITY: Treatment is symptomatic and supportive. Signs of toxicity follow a predictable course, requiring early recognition and aggressive supportive care. Patients may initially be asymptomatic; symptoms may be delayed for several hours after exposure. Carefully monitor airway, circulation and CNS function. Analgesics or opiates with or without an anticholinergic agent may be used to control severe abdominal pain, watch for possible toxic ileus. For mild to moderate overdose, consider GI decontamination and treat for shock. Monitor vital signs. Hypotension may be observed during the early phase of toxicity. Administer IV fluids, antiemetics, and vasopressors as needed. Treat seizures initially with benzodiazepines, add propofol or barbiturates if seizures persist.
    2) MANAGEMENT OF SEVERE TOXICITY: Treatment is supportive in the ICU. Multiorgan system failure may occur 1 to 7 days post ingestion. Treat with IV fluids, vasopressors, cardiac monitoring, intubation, antibiotics for sepsis, G-CSF for pancytopenia, dialysis for acute renal failure as needed.
    B) MONITORING OF PATIENT
    1) There have been reports of measuring colchicine plasma, serum and urine concentrations. However, these laboratory studies are unlikely to have a turnaround time to be clinically useful. Laboratory and other study evaluations should be based on the patient's signs and symptoms. Monitor vital signs and fluid status. Obtain serum electrolytes, CBC, and renal and liver functions tests as indicated. Fluid and electrolyte status should be followed closely and be replaced as is necessary.
    C) AIRWAY MANAGEMENT
    1) Airway management and support may be needed. Central nervous symptoms and ascending paralysis with respiratory involvement require aggressive supportive care including mechanical ventilation.
    D) MYELOSUPPRESSION
    1) Obtain a CBC with differential daily to monitor for bone marrow depression; continue until signs of improvement. Consider filgrastim for severe neutropenia. Patients suffering from bone marrow depression should be isolated to protect the patient from infection.
    2) CASE REPORT: Granulocyte colony stimulating factor (G-CSF) was given to 2 patients who developed leukopenia after unintentional ingestion of Colchicum autumnale (autumn crocus). One of the two patients received G-CSF 300 mcg daily for 3 days. Both patients recovered with subsequent normalization of their leukocyte counts (Brvar et al, 2004; Gabrscek et al, 2004).
    3) There is little data on the use of hematopoietic colony stimulating factors to treat neutropenia after drug overdose or idiosyncratic reactions. These agents have been shown to shorten the duration of severe neutropenia in patients receiving cancer chemotherapy (Hartman et al, 1997; Stull et al, 2005). They have also been used to treat agranulocytosis induced by nonchemotherapy drugs (Beauchesne & Shalansky, 1999). They may be considered in patients with severe neutropenia who have or are at significant risk for developing febrile neutropenia.
    a) Filgrastim: The usual starting dose in adults is 5 micrograms/kilogram/day by intravenous infusion or subcutaneous injection (Prod Info NEUPOGEN(R) injection, 2006).
    b) Sargramostim: Usual dose is 250 micrograms/square meter/day infused IV over 4 hours (Prod Info LEUKINE(R) injection, 2006).
    c) Monitor CBC with differential.
    E) ACUTE LUNG INJURY
    1) Respiratory distress can progress to acute respiratory distress syndrome. These symptoms usually develop in the second phase of illness (day 1 to 7 post ingestion) (Amrollahi-Sharifabadi et al, 2013).
    2) ONSET: Onset of acute lung injury after toxic exposure may be delayed up to 24 to 72 hours after exposure in some cases.
    3) NON-PHARMACOLOGIC TREATMENT: The treatment of acute lung injury is primarily supportive (Cataletto, 2012). Maintain adequate ventilation and oxygenation with frequent monitoring of arterial blood gases and/or pulse oximetry. If a high FIO2 is required to maintain adequate oxygenation, mechanical ventilation and positive-end-expiratory pressure (PEEP) may be required; ventilation with small tidal volumes (6 mL/kg) is preferred if ARDS develops (Haas, 2011; Stolbach & Hoffman, 2011).
    a) To minimize barotrauma and other complications, use the lowest amount of PEEP possible while maintaining adequate oxygenation. Use of smaller tidal volumes (6 mL/kg) and lower plateau pressures (30 cm water or less) has been associated with decreased mortality and more rapid weaning from mechanical ventilation in patients with ARDS (Brower et al, 2000). More treatment information may be obtained from ARDS Clinical Network website, NIH NHLBI ARDS Clinical Network Mechanical Ventilation Protocol Summary, http://www.ardsnet.org/node/77791 (NHLBI ARDS Network, 2008)
    4) FLUIDS: Crystalloid solutions must be administered judiciously. Pulmonary artery monitoring may help. In general the pulmonary artery wedge pressure should be kept relatively low while still maintaining adequate cardiac output, blood pressure and urine output (Stolbach & Hoffman, 2011).
    5) ANTIBIOTICS: Indicated only when there is evidence of infection (Artigas et al, 1998).
    6) EXPERIMENTAL THERAPY: Partial liquid ventilation has shown promise in preliminary studies (Kollef & Schuster, 1995).
    7) CALFACTANT: In a multicenter, randomized, blinded trial, endotracheal instillation of 2 doses of 80 mL/m(2) calfactant (35 mg/mL of phospholipid suspension in saline) in infants, children, and adolescents with acute lung injury resulted in acute improvement in oxygenation and lower mortality; however, no significant decrease in the course of respiratory failure measured by duration of ventilator therapy, intensive care unit, or hospital stay was noted. Adverse effects (transient hypoxia and hypotension) were more frequent in calfactant patients, but these effects were mild and did not require withdrawal from the study (Wilson et al, 2005).
    8) However, in a multicenter, randomized, controlled, and masked trial, endotracheal instillation of up to 3 doses of calfactant (30 mg) in adults only with acute lung injury/ARDS due to direct lung injury was not associated with improved oxygenation and longer term benefits compared to the placebo group. It was also associated with significant increases in hypoxia and hypotension (Willson et al, 2015).
    F) BLOOD COAGULATION DISORDER
    1) If severe coagulopathy with bleeding develops, transfuse with RBCs, platelets, and fresh frozen plasma as indicated.
    G) HYPOTENSIVE EPISODE
    1) SUMMARY
    a) Infuse 10 to 20 milliliters/kilogram of isotonic fluid and keep the patient supine. If hypotension persists, administer dopamine or norepinephrine. Consider central venous pressure monitoring to guide further fluid therapy.
    2) DOPAMINE
    a) DOSE: Begin at 5 micrograms per kilogram per minute progressing in 5 micrograms per kilogram per minute increments as needed (Prod Info dopamine hcl, 5% dextrose IV injection, 2004). If hypotension persists, dopamine may need to be discontinued and a more potent vasoconstrictor (eg, norepinephrine) should be considered (Prod Info dopamine hcl, 5% dextrose IV injection, 2004).
    b) CAUTION: If ventricular dysrhythmias occur, decrease rate of administration (Prod Info dopamine hcl, 5% dextrose IV injection, 2004). Extravasation may cause local tissue necrosis, administration through a central venous catheter is preferred (Prod Info dopamine hcl, 5% dextrose IV injection, 2004).
    3) NOREPINEPHRINE
    a) PREPARATION: 4 milligrams (1 amp) added to 1000 milliliters of diluent provides a concentration of 4 micrograms/milliliter of norepinephrine base. Norepinephrine bitartrate should be mixed in dextrose solutions (dextrose 5% in water, dextrose 5% in saline) since dextrose-containing solutions protect against excessive oxidation and subsequent potency loss. Administration in saline alone is not recommended (Prod Info norepinephrine bitartrate injection, 2005).
    b) DOSE
    1) ADULT: Dose range: 0.1 to 0.5 microgram/kilogram/minute (eg, 70 kg adult 7 to 35 mcg/min); titrate to maintain adequate blood pressure (Peberdy et al, 2010).
    2) CHILD: Dose range: 0.1 to 2 micrograms/kilogram/minute; titrate to maintain adequate blood pressure (Kleinman et al, 2010).
    3) CAUTION: Extravasation may cause local tissue ischemia, administration by central venous catheter is advised (Peberdy et al, 2010).
    H) CARDIOGENIC SHOCK
    1) EXTRACORPOREAL LIFE SUPPORT
    a) CASE REPORT: A 68-year-old woman inadvertently ingested C. autumnale mistaking the plant for wild leeks. Several days after exposure, the patient developed severe shock and multi-organ failure and was admitted to an ICU setting. Laboratory studies showed evidence of numerous clinical events including pancytopenia (requiring blood products), acute liver and renal failure, rhabdomyolysis, severe metabolic acidosis, and cardiac failure. A peak colchicine (10 ng/mL; therapeutic range, 0.6 mg/dL) plasma concentration was reached on day 4. Cardiogenic shock was initially treated with dobutamine (10 mcg/kg/min) and close hemodynamic monitoring including Swan-Ganz and echocardiography. A transthoracic echocardiography revealed global hypokinesia with a left ventricular ejection fraction of 5% to 10%, severe right ventricular dysfunction with moderate tricuspid regurgitation. However, despite these efforts hemodynamic instability persisted and the patient was started on extracorporeal life support (ECLS) at a rate of 3.5 L/min and 3800 rev/min. Gradually, her cardiac function improved and ECLS was removed on day 10. Ongoing clinical complications included sudden arrhythmias with third-degree atrioventricular block on day 12 with cardiac arrest that was treated successfully with resuscitation. Persistent renal failure required intermittent hemodialysis until day 23 and mechanical ventilation was needed until day 20. By day 24, the patient had completely recovered from multi-organ failure and was discharged to home with no permanent sequelae (Boisrame-Helms et al, 2015).
    I) SEIZURE
    1) SUMMARY
    a) Attempt initial control with a benzodiazepine (eg, diazepam, lorazepam). If seizures persist or recur, administer phenobarbital or propofol.
    b) Monitor for respiratory depression, hypotension, and dysrhythmias. Endotracheal intubation should be performed in patients with persistent seizures.
    c) Evaluate for hypoxia, electrolyte disturbances, and hypoglycemia (or, if immediate bedside glucose testing is not available, treat with intravenous dextrose).
    2) DIAZEPAM
    a) ADULT DOSE: Initially 5 to 10 mg IV, OR 0.15 mg/kg IV up to 10 mg per dose up to a rate of 5 mg/minute; may be repeated every 5 to 20 minutes as needed (Brophy et al, 2012; Prod Info diazepam IM, IV injection, 2008; Manno, 2003).
    b) PEDIATRIC DOSE: 0.1 to 0.5 mg/kg IV over 2 to 5 minutes; up to a maximum of 10 mg/dose. May repeat dose every 5 to 10 minutes as needed (Loddenkemper & Goodkin, 2011; Hegenbarth & American Academy of Pediatrics Committee on Drugs, 2008).
    c) Monitor for hypotension, respiratory depression, and the need for endotracheal intubation. Consider a second agent if seizures persist or recur after repeated doses of diazepam .
    3) NO INTRAVENOUS ACCESS
    a) DIAZEPAM may be given rectally or intramuscularly (Manno, 2003). RECTAL DOSE: CHILD: Greater than 12 years: 0.2 mg/kg; 6 to 11 years: 0.3 mg/kg; 2 to 5 years: 0.5 mg/kg (Brophy et al, 2012).
    b) MIDAZOLAM has been used intramuscularly and intranasally, particularly in children when intravenous access has not been established. ADULT DOSE: 0.2 mg/kg IM, up to a maximum dose of 10 mg (Brophy et al, 2012). PEDIATRIC DOSE: INTRAMUSCULAR: 0.2 mg/kg IM, up to a maximum dose of 7 mg (Chamberlain et al, 1997) OR 10 mg IM (weight greater than 40 kg); 5 mg IM (weight 13 to 40 kg); INTRANASAL: 0.2 to 0.5 mg/kg up to a maximum of 10 mg/dose (Loddenkemper & Goodkin, 2011; Brophy et al, 2012). BUCCAL midazolam, 10 mg, has been used in adolescents and older children (5-years-old or more) to control seizures when intravenous access was not established (Scott et al, 1999).
    4) LORAZEPAM
    a) MAXIMUM RATE: The rate of intravenous administration of lorazepam should not exceed 2 mg/min (Brophy et al, 2012; Prod Info lorazepam IM, IV injection, 2008).
    b) ADULT DOSE: 2 to 4 mg IV initially; repeat every 5 to 10 minutes as needed, if seizures persist (Manno, 2003; Brophy et al, 2012).
    c) PEDIATRIC DOSE: 0.05 to 0.1 mg/kg IV over 2 to 5 minutes, up to a maximum of 4 mg/dose; may repeat in 5 to 15 minutes as needed, if seizures continue (Brophy et al, 2012; Loddenkemper & Goodkin, 2011; Hegenbarth & American Academy of Pediatrics Committee on Drugs, 2008; Sreenath et al, 2010; Chin et al, 2008).
    5) PHENOBARBITAL
    a) ADULT LOADING DOSE: 20 mg/kg IV at an infusion rate of 50 to 100 mg/minute IV. An additional 5 to 10 mg/kg dose may be given 10 minutes after loading infusion if seizures persist or recur (Brophy et al, 2012).
    b) Patients receiving high doses will require endotracheal intubation and may require vasopressor support (Brophy et al, 2012).
    c) PEDIATRIC LOADING DOSE: 20 mg/kg may be given as single or divided application (2 mg/kg/minute in children weighing less than 40 kg up to 100 mg/min in children weighing greater than 40 kg). A plasma concentration of about 20 mg/L will be achieved by this dose (Loddenkemper & Goodkin, 2011).
    d) REPEAT PEDIATRIC DOSE: Repeat doses of 5 to 20 mg/kg may be given every 15 to 20 minutes if seizures persist, with cardiorespiratory monitoring (Loddenkemper & Goodkin, 2011).
    e) MONITOR: For hypotension, respiratory depression, and the need for endotracheal intubation (Loddenkemper & Goodkin, 2011; Manno, 2003).
    f) SERUM CONCENTRATION MONITORING: Monitor serum concentrations over the next 12 to 24 hours. Therapeutic serum concentrations of phenobarbital range from 10 to 40 mcg/mL, although the optimal plasma concentration for some individuals may vary outside this range (Hvidberg & Dam, 1976; Choonara & Rane, 1990; AMA Department of Drugs, 1992).
    6) OTHER AGENTS
    a) If seizures persist after phenobarbital, propofol or pentobarbital infusion, or neuromuscular paralysis with general anesthesia (isoflurane) and continuous EEG monitoring should be considered (Manno, 2003). Other anticonvulsants can be considered (eg, valproate sodium, levetiracetam, lacosamide, topiramate) if seizures persist or recur; however, there is very little data regarding their use in toxin induced seizures, controlled trials are not available to define the optimal dosage ranges for these agents in status epilepticus (Brophy et al, 2012):
    1) VALPROATE SODIUM: ADULT DOSE: An initial dose of 20 to 40 mg/kg IV, at a rate of 3 to 6 mg/kg/minute; may give an additional dose of 20 mg/kg 10 minutes after loading infusion. PEDIATRIC DOSE: 1.5 to 3 mg/kg/minute (Brophy et al, 2012).
    2) LEVETIRACETAM: ADULT DOSE: 1000 to 3000 mg IV, at a rate of 2 to 5 mg/kg/min IV. PEDIATRIC DOSE: 20 to 60 mg/kg IV (Brophy et al, 2012; Loddenkemper & Goodkin, 2011).
    3) LACOSAMIDE: ADULT DOSE: 200 to 400 mg IV; 200 mg IV over 15 minutes (Brophy et al, 2012). PEDIATRIC DOSE: In one study, median starting doses of 1.3 mg/kg/day and maintenance doses of 4.7 mg/kg/day were used in children 8 years and older (Loddenkemper & Goodkin, 2011).
    4) TOPIRAMATE: ADULT DOSE: 200 to 400 mg nasogastric/orally OR 300 to 1600 mg/day orally divided in 2 to 4 times daily (Brophy et al, 2012).
    J) MEASURE OF URINE OUTPUT
    1) Renal excretion of colchicine is greatest when blood levels are highest; therefore, adequate urine output must be maintained early on in the intoxicated patient (Garden & Judson, 1990).
    K) EXPERIMENTAL THERAPY
    1) MICE: FAB fragments have been tested on mice.
    a) When half a molar dose of Fab fragments compared to the colchicine dose was given intravenously and intraperitoneally, 80 percent of the mice survived, and at one-eighth molar, 20 percent survived (Urtizberea et al, 1990; Scherrmann et al, 1990).
    b) This treatment has NOT been tried on humans.

Eye Exposure

    6.8.1) DECONTAMINATION
    A) EYE IRRIGATION, ROUTINE: Remove contact lenses and irrigate exposed eyes with copious amounts of room temperature 0.9% saline or water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist after 15 minutes of irrigation, an ophthalmologic examination should be performed (Peate, 2007; Naradzay & Barish, 2006).

Dermal Exposure

    6.9.1) DECONTAMINATION
    A) DECONTAMINATION: Remove contaminated clothing and jewelry and place them in plastic bags. Wash exposed areas with soap and water for 10 to 15 minutes with gentle sponging to avoid skin breakdown. A physician may need to examine the area if irritation or pain persists (Burgess et al, 1999).

Enhanced Elimination

    A) SUMMARY
    1) Hemodialysis, hemofiltration, or exchange transfusion are not recommended because of the large apparent volume of distribution of colchicine (Gabrscek et al, 2004; Wallace, 1974). However, hemodialysis was used successfully in a woman that developed multi-organ failure including acute renal failure following C. autumnale ingestion (Boisrame-Helms et al, 2015).
    B) CASE REPORT
    1) HEMODIALYSIS: A 68-year-old woman inadvertently ingested C. autumnale mistaking the plant for wild leeks. Several days after exposure, the patient developed severe shock and multi-organ failure and was admitted to an ICU setting. Laboratory studies showed evidence of numerous clinical events including pancytopenia, acute liver and renal failure, rhabdomyolysis, severe metabolic acidosis, and cardiac failure. A peak colchicine (10 ng/mL; therapeutic range, 0.6 mg/dL) plasma concentration was reached on day 4. The patient required aggressive care that included multiple treatment modalities: gastrointestinal decontamination, extracorporeal life support (ECLS) for 10 days to improve cardiac function, blood products secondary to pancytopenia, mechanical ventilation and intermittent hemodialysis for persistent renal failure until day 23. By day 24, the patient had completely recovered from multi-organ failure and was discharged to home with no permanent sequelae (Boisrame-Helms et al, 2015).

Case Reports

    A) ADULT
    1) GLORIOSA SUPERBA TUBERS: A 29-year-old ate 100 grams of Gloriosa superba tubers, (which contained approximately 60 mg of colchicine). Four hours postingestion he arrived at a medical facility complaining of intense thirst, a burning sensation of the mouth and throat, abdominal pain, and vomiting. He was lavaged and given IV fluids for dehydration. He became oliguric for 24 hours. By day two he had mild hematuria and proteinuria and complained of severe body pain and generalized chest pain. ECG was normal at this time, but by day 3 the chest pain was worse, he had dyspnea, a triple rhythm, and bilateral basal crepitations. The ECG showed ST-elevations which persisted for more than a week. On day 5 he developed bleeding gums, hematuria, and subconjunctival hemorrhages. Over the following 48 hours he was given 3 pints of fresh blood. He gradually improved and was transferred to a psychiatric facility 3 weeks postingestion (Nagaratnam et al, 1973).
    2) COLCHICUM AUTUMNALE (MEADOW SAFFRON): Several hours after the accidental ingestion of Colchicum autumnale (meadow saffron) instead of the wild garlic (Allium ursinum), a 62-year-old man developed general weakness, abdominal cramps, nausea, vomiting and diarrhea. Despite the use of activated charcoal, gastric lavage and supportive therapy, his condition deteriorated and he experienced confusion, fever, hypothermia, hypotension, tachycardia, and tachypnea. In addition, he developed increased blood levels of hepatic enzymes, creatine kinase, blood urea nitrogen, and hyperbilirubinemia, prolonged prothrombin time, thrombocytopenia and multiorgan system failure. He subsequently died 5 days after poisoning in oliguria and cardiopulmonary insufficiency (Sundov et al, 2005).
    a) Postmortem examination showed marked pulmonary edema and congestion, enlarged liver and spleen, petechial bleeding in all fatty and subserosal tissue, nephrotoxic acute tubular necrosis, and blunt and shortened intestinal villi. In addition, left cardiac ventricle hypertrophy, cerebral edema, significant hemorrhagic necrosis around central hepatic veins were observed. Hepatocytes revealed hydropic or microvesicular fatty change, and portal triads were sparely infiltrated by mononuclei. In the spleen, disruption of white pulp and congestion of red pulp was observed (Sundov et al, 2005).

Summary

    A) TOXIC DOSE: Estimated fatal dose of pure colchicine is 7 to 60 mg. A colchicine content of tubers of Gloriosa superba is approximately 0.3%. A potentially lethal amount is contained in a few seeds of C autumnale, and in 2.5 to 5 g of G superba tubers. In adults, a patient survived after ingesting 40 flowers of the autumn crocus (estimated colchicine dose of 17.1 to 102.7 mg) though he did develop severe gastroenteritis and asthenia. However, in another case, a 21-year-old man ingested 10 autumn crocus flowers and died 64 hours later of multi-organ failure.

Minimum Lethal Exposure

    A) SPECIFIC SUBSTANCE
    1) COLCHICINE
    a) The estimated fatal dose of pure colchicine is 7 to 60 mg (Ellwood & Robb, 1971) and doses of 0.5 mg/kg may be fatal (Bismuth et al, 1977).
    b) One study reported that patients who ingested more than 0.8 mg/kg of colchicine died, while those with under 0.5 mg/kg survived (Bismuth et al, 1977). There does not seem to be a clear distinction between the nontoxic, toxic, and lethal doses of colchicine (Mendis, 1989),
    2) COLCHICUM AUTUMNALE
    a) SUMMARY: Ingestion of 12 flowers of Colchicum autumnale resulted in fatality in a 16-year-old girl. The estimated dose of colchicine was 270 mg (Ellwood & Robb, 1971).
    b) CASE REPORT: A 76-year-old man unintentionally ingested 2 whole Colchicum autumnale plants, developed multi-organ failure, and died approximately 3 days post ingestion. The total estimated colchicine dose ingested was 10 to 60 mg (0.14 to 0.82 mg/kg) (Brvar et al, 2004a).
    c) CASE REPORT: A 21-year-old man intentionally ingested 10 flowers of Colchicum autumnale. He was admitted to the hospital about 54 hours post ingestion and developed multi-organ failure. Despite symptomatic therapy, he died 64 hours post ingestion (Zoelen et al, 2002).
    3) COLCHICUM PERSICUM
    a) CASE REPORT: A 39-year-old man developed a sudden onset of severe dyspnea and respiratory distress progressing to apnea approximately 30 hours after inadvertently ingesting C. persicum thought to be wild garlic. Despite immediate oxygenation, mechanical ventilation and cardiopulmonary resuscitation, the patient did not respond to resuscitation efforts and died of cardiopulmonary arrest. Postmortem examination showed pulmonary edema and congestion and the plant ingested was confirmed to be C. persicum (Amrollahi-Sharifabadi et al, 2013).
    4) GLORIOSA SUPERBA
    a) SUMMARY: The colchicine content of the tubers of Gloriosa superba native to Asia and Africa is approximately 6 mg per 10 g of tubers (Dunuwille et al, 1968).
    b) CASE REPORT: A 28-year-old woman intentionally ingested Gloriosa superba tubers and 6 hours later she had profuse vomiting, diarrhea and abdominal pain. Upon admission, she was alert and decontaminated with activated charcoal. She was progressing well until day 5 when she developed generalized tonic-clonic seizures and hypocalcemia was also noted. By day 7, her level of consciousness declined with a Glasgow coma scale score of 6/15. Laboratory studies were within normal limits with the exception of mildly elevated liver enzymes and a serological work-up was also negative. Diagnostic studies, including a CT scan of the head and lumbar puncture, were negative. An EEG detected bilateral diffuse slow waves that were suggestive of encephalopathy. In addition, a MR brain scan showed T2 hyper intensities in the caudate and lentiform nuclei of the basal ganglia that are consistent with toxic encephalopathy; the thalamic regions were unaffected. With supportive care, her neurologic function improved (Glasgow coma scale score 11/15) in about 2 weeks (Gooneratne et al, 2014).
    c) CASE REPORT: An adult Ceylonese female developed severe symptoms, including vomiting and diarrhea, thrombocytopenia, and severe alopecia following ingestion of approximately 125 g Gloriosa superba tubers which contain approximately 350 mg of colchicine (Gooneratne, 1966).

Maximum Tolerated Exposure

    A) COLCHICUM AUTUMNALE
    1) CASE REPORT: A 68-year-old woman inadvertently ingested C. autumnale mistaking the plant for wild leeks. Several days after exposure, the patient developed severe shock and multi-organ failure and was admitted to an ICU setting. Laboratory studies showed evidence of numerous clinical events including pancytopenia (requiring blood products), acute liver and renal failure, rhabdomyolysis, severe metabolic acidosis, and cardiac failure. A peak colchicine (10 ng/mL; therapeutic range, 0.6 mg/dL) plasma concentration was reached on day 4. Cardiogenic shock was initially treated with dobutamine (10 mcg/kg/min) and close hemodynamic monitoring including Swan-Ganz and echocardiography. A transthoracic echocardiography revealed global hypokinesia with a left ventricular ejection fraction of 5% to 10%, severe right ventricular dysfunction with moderate tricuspid regurgitation. However, despite these efforts hemodynamic instability persisted and the patient was started on extracorporeal life support (ECLS) at a rate of 3.5 L/min and 3800 rev/min. Gradually, her cardiac function improved and ECLS was removed on day 10. Ongoing clinical complications included sudden arrhythmias with third-degree atrioventricular block on day 12 with cardiac arrest that was treated successfully with resuscitation. Persistent renal failure required intermittent hemodialysis until day 23 and mechanical ventilation was needed until day 20. By day 24, the patient had completely recovered from multi-organ failure and was discharged to home with no permanent sequelae (Boisrame-Helms et al, 2015).
    2) CASE REPORT: Following the ingestion of 40 flowers of Colchicum autumnale, a 44-year-old man developed severe gastroenteritis and asthenia. Estimated colchicine dose was 17.1 to 102.7 mg. The patient fully recovered following symptomatic therapy (Danel et al, 2001).

Serum Plasma Blood Concentrations

    7.5.2) TOXIC CONCENTRATIONS
    A) TOXIC CONCENTRATION LEVELS
    1) ADULT
    a) Colchicine plasma concentration at 6 hours post-ingestion of 40 flowers of Colchicum autumnale was 3.8 nanograms/milliliter (normal 0.3 to 2.4 nanograms/milliliter). The estimated amount of colchicine in the flowers was 17.1 to 102.7 milligrams. The patient survived following symptomatic therapy (Danel et al, 2001).
    b) Serum and urine colchicine levels were 5 mcg/L and 30 mcg/L, respectively, 3 days after a 71-year-old woman unintentionally ingested an unknown amount of Colchicum autumnale (autumn crocus) (Brvar et al, 2004).
    c) A serum colchicine level was 14 mcg/L in a 76-year-old man approximately 3 days after unintentionally ingesting 2 whole Colchicum autumnale plants. The total estimated colchicine dose ingested was 10 to 60 mg (0.14 to 0.82 mg/kg). He died 3 days after ingestion (Brvar et al, 2004a).

Pharmacologic Mechanism

    A) The alkaloid colchicine is contained in all parts of plants in this group. A number of related alkaloids are also present but are of unknown toxicological significance.
    B) Colchicine has an antimitotic effect which results in arrest of cell division in the metaphase stage.
    1) Body cells with the highest rate of cell division are the most susceptible (i.e. cells derived from the bone marrow and the epiphelial cells of the gastrointestinal tract).
    C) The depression of cell division is maximum about 10 hours following ingestion.

Clinical Effects

    11.1.2) BOVINE/CATTLE
    A) Seven cows ingested unknown amounts of the leaves and capsules of C autumnale.
    1) Within a few hours, 1 died and 4 others exhibited symptoms of sleeplessness, fatigue, gait disorders, reddened eyes, hypersalivation, bloody vomiting, and diarrhea.
    2) Despite supportive measures, administration of isotonic saline with calcium and magnesium, administration of sorbitol and menbutone, 4 animals went into shock and died within 72 hours.
    3) Of the 2 which survived, one never developed symptoms and 1 had only mild diarrhea (Chareyre et al, 1989).
    B) Crude or dehydrated bulbs of autumn crocus (Colchicum autumnale L.) were fed to 11 calves. All developed severe diarrhea and died or were euthanized within 63 hours. At necropsy, HPLC on refined acetone extracts of organs of poisoned cattle demonstrated colchicine and demecolcine.
    1) The gastrointestinal mucosa was edematous and hemorrhagic. The tongue, esophagus, forestomach, renal pelvis, urinary bladder, neck cell layers of the abomasal gastric glands, and intestinal cryps showed karyophyknosis and kayorrhexis in the basal cell layers. Similar findings were seen in the Kupffer cells, renal tubular epithelial cells and lymphocytes, closely resembling those reported in humans with colchicine intoxication (Yamada et al, 1998).
    11.1.5) EQUINE/HORSE
    A) Following feeding of a new delivery of hay from Wouther Germany, 3 of 17 horses developed colic within a few days. One horse died. Post-mortem, there was an intensive accumulation of serous or serous-hemorrhagic fluid in the thorax and abdomen. The hay was heavily contaminated by autumn crocus (Colchicum autumnale) (Kamphues & Meyer, 1990).

Range Of Toxicity

    11.3.2) MINIMAL TOXIC DOSE
    A) CATTLE
    1) The minimum toxic dose in cattle is estimated at 10 g/kg of fresh leaves or 2 to 3 g/kg of dry leaves (Jean-Blain & Grisvard, 1973; Derivaux & Liegeois, 1962).

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