MOBILE VIEW  | 

EDETATE CALCIUM DISODIUM

Classification   |    Detailed evidence-based information

Therapeutic Toxic Class

    A) Edetate calcium disodium is a sterile, injectable chelating agent used for reducing blood levels and depot stores of lead in acute and chronic lead poisoning and lead encephalopathy.

Specific Substances

    1) Calcium disodium edathamil
    2) Calcium disodium edetate
    3) Calcium disodium EDTA
    4) Calcium disodium ethylenediaminetetraacetate
    5) Calcium disodium versenate
    6) Calcium EDTA
    7) Edetate Ca disodium
    8) EDTA, calcium derivative, disodium salt
    9) Sodium calcium edetate
    10) CAS 62-33-9
    1.2.1) MOLECULAR FORMULA
    1) C10-H12-Ca-N2-Na2-O8.xH2O (Prod Info Calcium disodium versenate, 2004)

Available Forms Sources

    A) FORMS
    1) Edetate calcium disodium is a sterile, injectable concentrated solution for intravenous infusion or intramuscular injection. It is available in 5 mL ampules each containing 1000 mg of edetate calcium disodium in water for injection (equivalent to 200 mg/mL) in water for injection (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012).
    B) USES
    1) Edetate calcium disodium is indicated for reducing blood levels and depot stores of lead in acute and chronic lead poisoning and lead encephalopathy in adults and pediatric populations (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012).

Life Support

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

Clinical Effects

    0.2.1) SUMMARY OF EXPOSURE
    A) WITH THERAPEUTIC USE
    1) The following adverse effects have been reported with the use of edetate calcium disodium: Inverted T waves and cardiac rhythm irregularities, transient decreases in blood pressure, acute necrosis of the proximal tubules, microscopic hematuria, glycosuria, proteinuria, nephrotoxicity, acute renal failure, dermatitis and exfoliative dermatitis of the scrotum, injection site pain following intramuscular injection, hypocalcemia, hypercalcemia, nausea, vomiting, abdominal pain, diarrhea, mild elevations in SGOT and SGPT, anemia, bone marrow depression, fatigue, myalgia, zinc deficiency, headache, tremors, numbness, and tingling.
    2) In patients with lead encephalopathy, edetate calcium disodium may worsen cerebral edema. For patients with lead encephalopathy, edetate calcium disodium should be begun 4 hours after administration of dimercaprol.
    B) WITH POISONING/EXPOSURE
    1) No ill effects were observed following inadvertent administration of 5 times the recommended dose, infused intravenously over a 24-hour period of time, to an asymptomatic 16-month-old with a blood lead level of 56 mcg/dL
    0.2.3) VITAL SIGNS
    A) WITH THERAPEUTIC USE
    1) A transient decrease in blood pressure, ranging from 5 to 20 mmHg was reported in over half of patients in one study.
    0.2.20) REPRODUCTIVE
    A) There are no adequate well-controlled studies of the use of edetate calcium disodium in pregnant women. Edetate calcium disodium is in pregnancy category B. It is not known if edetate calcium disodium is excreted in human breast milk. A reproduction study in rats at doses up to about 25 to 40 times the human dose revealed evidence of fetal malformations. These teratogenic effects were prevented by simultaneous supplementation of dietary zinc.

Laboratory Monitoring

    A) Monitor renal and hepatic function, serum electrolytes, urinalysis, urine sediment, and ECG. Levels should be checked before each course of therapy and monitored daily during therapy in severe cases and after the second and fifth day of therapy in less serious cases. Monitor blood lead and zinc levels.
    B) Refer to the "Lead" document for additional information.

Treatment Overview

    0.4.6) PARENTERAL EXPOSURE
    A) There is no antidote.
    B) Treatment is symptomatic and supportive.
    C) No ill effects were observed following inadvertent administration of 5 times the recommended dose, infused intravenously over a 24 hour period of time, to an asymptomatic 16-month-old with a blood lead level of 56 mcg/dL.
    D) HYPOTENSION: Infuse 10 to 20 mL/kg isotonic fluid. If hypotension persists, administer dopamine (5 to 20 mcg/kg/min) or norepinephrine (ADULT: begin infusion at 0.5 to 1 mcg/min; CHILD: begin infusion at 0.1 mcg/kg/min); titrate to desired response.
    E) ACUTE OR CHRONIC EXPOSURE
    1) OBTAIN BLOOD LEAD LEVEL - Hospitalize any child with a blood lead level (BLL) of 45-69 micrograms/deciliter (mcg/dL) and symptoms (significant CNS or protracted gastrointestinal symptoms), or with BLL of greater than or equal to 70 mcg/dL, with or without symptoms .
    2) Chelation therapy should be instituted in all patients with a blood lead level of 45 micrograms/deciliter (2.2 micromoles/liter) or greater using venous blood lead measurement. The child should be in a lead-safe environment before beginning chelation therapy . Patients who do not have severe lead poisoning and can tolerate oral agents are generally treated with oral agents (primarily succimer).
    3) CALCIUM EDTA PROVOCATION TEST - Has been used in the past to determine necessity for therapeutic chelation in children with blood lead levels of 25 to 44 mcg/dL. Because of difficulty in administration, expense, and the unreliability as a predictor of total body lead burden, this test is rarely used in clinical practice.
    4) CHELATION THERAPY
    a) Chelation therapy should be instituted in all patients with a blood lead level of 45 micrograms/deciliter (2.2 micromoles/liter) or greater using venous blood lead measurement. If a capillary sample is used and BLL is elevated, a second BLL by venipuncture should be performed before starting chelation therapy. The child should be in a lead-safe environment before beginning chelation therapy. Returning the individual to a contaminated environment may result in re-accumulation of the metal. Symptoms and signs, along with the blood lead level, determine the route, dose, and agent to be used for chelation. Oral agents (primarily succimer) are generally used in patients without severe poisoning or evidence of encephalopathy, who are able to tolerate oral medications.
    b) BAL (dimercaprol) - 3 to 5 mg/kg/dose deep IM every 4 hours for 2 days; then every 4 to 6 hours for 2 more days; then every 4 to 12 hours up to an additional 7 days.
    c) CALCIUM EDTA - for children with lead encephalopathy or lead levels of 70 mcg/dl or higher, dose is 1500 mg/m(2)/day administered as a continuous intravenous infusion starting 4 hours after the administration of dimercaprol. For children without encephalopathy, the dose is 1000 mg/m(2)/day administered as a continuous infusion. Alternatively, it may be administered at a dose of 50 to 75 mg/kg/day deep IM in 3 to 6 divided doses for up to 5 days; however the pain associated with this route of administration make it less desirable. Establish adequate urine output prior to administering calcium EDTA.
    d) SUCCIMER - Initial dose is 10 mg/kg or 350 mg/m(2) orally every 8 hours for 5 days; reduced to every 12 hours for an additional 2 weeks. OSHA prohibits prophylactic chelation therapy in workers occupationally exposed to lead.
    e) D-PENICILLAMINE - 250 mg 4 times a day PO for up to 5 days. Do not exceed 40 mg/kg/day. OSHA prohibits prophylactic chelation therapy in workers occupationally exposed to lead.
    5) ESTABLISH ADEQUATE FLUID BALANCE with a urine flow of 1 to 2 mL/kg/hour, unless encephalopathy present or suspected, or increased intracranial pressure noted on CT. Do not force fluids if neuro compromise possible.
    6) PERFORM A NEUROLOGICAL EXAM with particular reference to the presence of encephalopathy; particularly after starting EDTA, mental status may worsen; observe carefully.
    7) CEREBRAL EDEMA - May be managed by ventilation and the administration of 1.5 g/kg of 20% mannitol IV over 20 minutes. Dexamethasone: up to 1 to 2 mg/kg/day IV in divided doses. Lumbar puncture is dangerous in the presence of increased intracranial pressure.
    8) SEIZURES: Administer a benzodiazepine; DIAZEPAM (ADULT: 5 to 10 mg IV initially; repeat every 5 to 20 minutes as needed. CHILD: 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) or LORAZEPAM (ADULT: 2 to 4 mg IV initially; repeat every 5 to 10 minutes as needed, if seizures persist. CHILD: 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).
    a) Consider phenobarbital or propofol if seizures recur after diazepam 30 mg (adults) or 10 mg (children greater than 5 years).
    b) Monitor for hypotension, dysrhythmias, respiratory depression, and need for endotracheal intubation. Evaluate for hypoglycemia, electrolyte disturbances, and hypoxia.
    9) FOR ENCEPHALOPATHY, institute BAL followed 4 hours later by EDTA in the maximum dose. Administer EDTA as a continuous infusion over 24 hours.
    10) Although chelation therapy is associated with significant decrease in BLL, surgery may be considered to remove lead foreign bodies.
    11) Refer to the "Lead" document for more information.

Range Of Toxicity

    A) No ill effects were observed following inadvertent administration of 5 times the recommended dose, infused intravenously over a 24 hour period of time, to an asymptomatic 16 month old with a blood lead level of 56 mcg/dL

Summary Of Exposure

    A) WITH THERAPEUTIC USE
    1) The following adverse effects have been reported with the use of edetate calcium disodium: Inverted T waves and cardiac rhythm irregularities, transient decreases in blood pressure, acute necrosis of the proximal tubules, microscopic hematuria, glycosuria, proteinuria, nephrotoxicity, acute renal failure, dermatitis and exfoliative dermatitis of the scrotum, injection site pain following intramuscular injection, hypocalcemia, hypercalcemia, nausea, vomiting, abdominal pain, diarrhea, mild elevations in SGOT and SGPT, anemia, bone marrow depression, fatigue, myalgia, zinc deficiency, headache, tremors, numbness, and tingling.
    2) In patients with lead encephalopathy, edetate calcium disodium may worsen cerebral edema. For patients with lead encephalopathy, edetate calcium disodium should be begun 4 hours after administration of dimercaprol.
    B) WITH POISONING/EXPOSURE
    1) No ill effects were observed following inadvertent administration of 5 times the recommended dose, infused intravenously over a 24-hour period of time, to an asymptomatic 16-month-old with a blood lead level of 56 mcg/dL

Vital Signs

    3.3.1) SUMMARY
    A) WITH THERAPEUTIC USE
    1) A transient decrease in blood pressure, ranging from 5 to 20 mmHg was reported in over half of patients in one study.
    3.3.4) BLOOD PRESSURE
    A) WITH THERAPEUTIC USE
    1) A transient decrease in blood pressure, ranging from 5 to 20 mmHg was reported in over half of patients in one study (Seven, 1960).

Heent

    3.4.3) EYES
    A) WITH THERAPEUTIC USE
    1) Lacrimation has been reported, occurring toward the end of the infusion, more commonly at doses of 3 grams/day or more (Seven, 1960).

Cardiovascular

    3.5.2) CLINICAL EFFECTS
    A) ELECTROCARDIOGRAM ABNORMAL
    1) WITH THERAPEUTIC USE
    a) Inverted T waves have been reported (Klaasen, 2001).
    B) CONDUCTION DISORDER OF THE HEART
    1) WITH THERAPEUTIC USE
    a) Cardiac rhythm irregularities have been reported (Prod Info Calcium disodium versenate, 2004).

Neurologic

    3.7.2) CLINICAL EFFECTS
    A) CENTRAL NERVOUS SYSTEM FINDING
    1) WITH THERAPEUTIC USE
    a) Reported adverse effects include dose-related fatigue, myalgia, and frontal headache. These reactions occurred after infusions of high doses formerly used to treat patients with Wilson's disease, usually 3 grams or more over a 24-hour period. Initial symptoms of numbness, tingling, yawning, nasal congestion, and prolonged sneezing occurred toward the end of an infusion, and were followed by abrupt onset of fever and chills.
    1) Four to 8 hours after infusion, malaise, fatigue, severe myalgia, periarticular muscle and joint pain, frontal headache, anorexia, nausea, urinary frequency, and thirst were noted. The fever persisted for 12 to 18 hours, with other symptoms subsiding gradually afterwards (Seven, 1960).
    B) TREMOR
    1) WITH THERAPEUTIC USE
    a) Tremors, numbness, tingling, and headache have been reported (Prod Info Calcium disodium versenate, 2004).
    C) INTRACRANIAL PRESSURE
    1) WITH POISONING/EXPOSURE
    a) Following intravenous infusion of edetate calcium disodium, patients with lead encephalopathy and cerebral edema may experience a lethal increase in intracranial pressure. The intramuscular route is the preferred route for these patients. In addition, this agent may aggravate the symptoms of severe lead poisoning (eg; cerebral edema, renal tubular necrosis) (Prod Info Calcium disodium versenate, 2004).

Gastrointestinal

    3.8.2) CLINICAL EFFECTS
    A) NAUSEA, VOMITING AND DIARRHEA
    1) WITH THERAPEUTIC USE
    a) Reported adverse effects included anorexia, nausea, vomiting, abdominal pain and diarrhea (Seven, 1960; Prod Info Calcium disodium versenate, 2004).
    B) CHEILITIS
    1) WITH THERAPEUTIC USE
    a) Cheilosis has been reported (Prod Info Calcium disodium versenate, 2004).
    C) THIRST FINDING
    1) WITH THERAPEUTIC USE
    a) Excessive thirst has been reported (Prod Info Calcium disodium versenate, 2004).

Hepatic

    3.9.2) CLINICAL EFFECTS
    A) LIVER ENZYMES ABNORMAL
    1) WITH THERAPEUTIC USE
    a) Mild elevations in SGOT and SGPT are common. Levels return to normal within 48 hours of cessation of therapy (Prod Info Calcium disodium versenate, 2004).

Genitourinary

    3.10.2) CLINICAL EFFECTS
    A) ACUTE TUBULAR NECROSIS
    1) WITH THERAPEUTIC USE
    a) Acute necrosis of the proximal tubules, which can result in fatal nephrosis, has been reported. Changes in distal tubules and glomeruli have been reported infrequently (Prod Info Calcium disodium versenate, 2004).
    B) BLOOD IN URINE
    1) WITH THERAPEUTIC USE
    a) Microscopic hematuria, glycosuria, proteinuria, and large epithelial cells in urinary sediment have been reported (Prod Info Calcium disodium versenate, 2004).
    C) TOXIC NEPHROPATHY
    1) WITH THERAPEUTIC USE
    a) Nephrotoxicity is the most common adverse effect of edetate calcium disodium. In a study of 130 children receiving chelation therapy for lead intoxication, including edetate calcium disodium 25 mg/kg intramuscularly every 12 hours for 5 days, 16% developed biochemical evidence of nephrotoxicity; 4 children (3%) developed severe, oliguric, acute renal failure.
    1) Transient mild elevation of serum creatinine was the most common finding; mild transient proteinuria and glycosuria were also observed. The effects were reversible in all cases; the onset and duration of serum creatinine elevations were 6 to 7 days and 11 to 22 days, respectively (Moel & Kumar, 1982; Seven, 1960).

Hematologic

    3.13.2) CLINICAL EFFECTS
    A) ANEMIA
    1) WITH THERAPEUTIC USE
    a) Anemia has been reported by the manufacturer. Anemia was also reported in a patient with Wilson's disease treated chronically with a combination of edetate calcium disodium and disodium EDTA. After a total dose of 72 grams had been given, anemia was noted. It resolved after discontinuation of the chelators (Prod Info Calcium disodium versenate, 2004; Seven, 1960).
    B) MYELOSUPPRESSION
    1) WITH THERAPEUTIC USE
    a) Transient bone marrow depression has been reported (Prod Info Calcium disodium versenate, 2004).

Dermatologic

    3.14.2) CLINICAL EFFECTS
    A) DERMATITIS
    1) WITH THERAPEUTIC USE
    a) Dermatitis has been reported following chronic therapy. The lesions appear initially on the nasal cheek folds as erythematous macular lesions, which become papular and scaling and progress to the corners of the mouth, chin, forehead, trunk or extremities. They resemble vitamin B6 deficiency, but have been reported in patients receiving adequate dietary vitamin supplementation (Seven, 1960).
    b) Exfoliative dermatitis of the scrotum has been reported and responded to vitamin replacement while continuing therapy in 2 cases. The lesions disappear after discontinuation of therapy, usually within 6 days (Seven, 1960).
    B) INJECTION SITE PAIN
    1) WITH THERAPEUTIC USE
    a) Injection site pain has been reported following intramuscular injection (Prod Info Calcium disodium versenate, 2004).

Musculoskeletal

    3.15.2) CLINICAL EFFECTS
    A) MUSCLE PAIN
    1) WITH THERAPEUTIC USE
    a) Severe myalgia and periarticular muscle and joint pain have been reported (Prod Info Calcium disodium versenate, 2004; Seven, 1960).

Immunologic

    3.19.2) CLINICAL EFFECTS
    A) ACUTE ALLERGIC REACTION
    1) WITH THERAPEUTIC USE
    a) Histamine-like reactions (sneezing, nasal congestion, and lacrimation) and rash have been reported (Prod Info Calcium disodium versenate, 2004).

Reproductive

    3.20.1) SUMMARY
    A) There are no adequate well-controlled studies of the use of edetate calcium disodium in pregnant women. Edetate calcium disodium is in pregnancy category B. It is not known if edetate calcium disodium is excreted in human breast milk. A reproduction study in rats at doses up to about 25 to 40 times the human dose revealed evidence of fetal malformations. These teratogenic effects were prevented by simultaneous supplementation of dietary zinc.
    3.20.2) TERATOGENICITY
    A) LACK OF EFFECT
    1) ANIMAL STUDIES
    a) Oral doses of 1340 mg/kg were not teratogenic in rats (Schardein et al, 1981).
    B) ANIMAL STUDIES
    1) A reproduction study in rats at doses up to about 25 to 40 times the human dose revealed evidence of fetal malformations. These teratogenic effects were prevented by simultaneous supplementation of dietary zinc (Prod Info Calcium disodium versenate, 2004).
    2) Edetate calcium disodium was teratogenic in rats when given in doses comparable to those used in humans. Doses of 4, 6, and 8 mmol/m(2)/day subcutaneously (comparable to human doses of 1500, 2250, and 3000 mg/m(2)/day) resulted in submucous cleft, cleft palate, adactyly-syndactyly, curly tail, and abnormal ribs and vertebrae. These effects were prevented by zinc supplementation (Brownie et al, 1986).
    3.20.3) EFFECTS IN PREGNANCY
    A) PREGNANCY CATEGORY
    1) Edetate calcium disodium is in pregnancy category B (Prod Info Calcium disodium versenate, 2004).
    B) HUMAN
    1) There are no adequate well-controlled studies of the use of edetate calcium disodium in pregnant women. There is no recognized use of edetate calcium disodium during labor and delivery; its effects during these processes are unknown (Prod Info Calcium disodium versenate, 2004).
    2) CASE REPORT - In one case, a woman treated in the eighth month of pregnancy with 75 mg/kg/day for 7 days delivered a normal infant 4 weeks later (Angle & McIntire, 1964).
    C) ANIMAL STUDIES
    1) One study performed in rats at doses up to 13 times the human dose revealed no evidence of harm to the fetus (Prod Info Calcium disodium versenate, 2004).
    3.20.4) EFFECTS DURING BREAST-FEEDING
    A) LACK OF INFORMATION
    1) It is not known if edetate calcium disodium is excreted in human breast milk (Prod Info Calcium disodium versenate, 2004).
    3.20.5) FERTILITY
    A) ANIMAL STUDIES
    1) One study performed in rats at doses up to 13 times the human dose revealed no evidence of impaired fertility or harm to the fetus (Prod Info Calcium disodium versenate, 2004).

Carcinogenicity

    3.21.1) IARC CATEGORY
    A) IARC Carcinogenicity Ratings for CAS62-33-9 (International Agency for Research on Cancer (IARC), 2016; International Agency for Research on Cancer, 2015; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010a; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2008; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2007; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2006; IARC, 2004):
    1) Not Listed
    3.21.4) ANIMAL STUDIES
    A) LACK OF INFORMATION
    1) Long-term animal studies have not been conducted to evaluate the carcinogenic potential of edetate calcium disodium (Prod Info Calcium disodium versenate, 2004).

Genotoxicity

    A) Long-term animal studies have not been conducted to evaluate the mutagenic potential of edetate calcium disodium (Prod Info Calcium disodium versenate, 2004).

Monitoring Parameters Levels

    4.1.1) SUMMARY
    A) Monitor renal and hepatic function, serum electrolytes, urinalysis, urine sediment, and ECG. Levels should be checked before each course of therapy and monitored daily during therapy in severe cases and after the second and fifth day of therapy in less serious cases. Monitor blood lead and zinc levels.
    B) Refer to the "Lead" document for additional information.
    4.1.2) SERUM/BLOOD
    A) Monitor renal and hepatic function and serum electrolytes. Levels should be checked before each course of therapy and monitored daily during therapy in severe cases and after the second and fifth day of therapy in less serious cases. Monitor zinc levels (Prod Info Calcium disodium versenate, 2004).
    B) Elevation of blood lead level (BLL) is essential to the diagnosis of childhood and industrial cases. Children with a blood lead level of 45 mcg/dL or greater require medical intervention and chelation.
    C) Children with venous BLLs of 20 mcg/dL or greater or with venous BLLs of 15-19 mcg/dL that persist for at least 3 months should receive medical evaluation and treatment. Chelation therapy should be instituted in all children with a blood lead level of 45 mcg/dL or greater using venous blood lead measurement.
    D) Obtain a CBC to assess for anemia and perform a peripheral smear. Hypochromia and basophilic stippling suggest lead intoxication, but they are non-specific and their absence does not rule out the diagnosis.
    E) Employees whose blood lead level is equal to or greater than 50 mcg/100 g shall be temporarily removed from exposure until their blood lead level is at or below 40 mcg/dl.
    4.1.3) URINE
    A) Monitor urinalysis and urine sediment before each course of therapy, daily during therapy in severe cases, and after the second and fifth day of therapy in less serious cases (Prod Info Calcium disodium versenate, 2004).
    4.1.4) OTHER
    A) OTHER
    1) Monitor ECG for cardiac rhythm abnormalities during intravenous therapy (Prod Info Calcium disodium versenate, 2004).
    2) Edetate calcium disodium mobilization tests should not be performed in patients with blood lead levels above 55 mcg/dL or in symptomatic patients for whom chelation therapy is indicated (Prod Info Calcium disodium versenate, 2004).

Life Support

    A) Support respiratory and cardiovascular function.

Monitoring

    A) Monitor renal and hepatic function, serum electrolytes, urinalysis, urine sediment, and ECG. Levels should be checked before each course of therapy and monitored daily during therapy in severe cases and after the second and fifth day of therapy in less serious cases. Monitor blood lead and zinc levels.
    B) Refer to the "Lead" document for additional information.

Summary

    A) No ill effects were observed following inadvertent administration of 5 times the recommended dose, infused intravenously over a 24 hour period of time, to an asymptomatic 16 month old with a blood lead level of 56 mcg/dL

Therapeutic Dose

    7.2.1) ADULT
    A) BLOOD LEVELS BETWEEN 20 AND 70 MCG/DL AND ASYMPTOMATIC
    1) 1000 mg/m(2) IM (divided into equal doses spaced 8 to 12 hours apart) or IV (infused over 8 to 12 hours) daily for 5 days, followed by a 2- to 4-day rest period in order to allow redistribution of lead; a second course of treatment may then be employed as indicated (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012)
    2) DO NOT exceed recommended dose (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012)
    B) BLOOD LEVELS ABOVE 70 MCG/DL OR SYMPTOMATIC
    1) Use in conjunction with BAL (dimercaprol) (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012)
    2) DO NOT exceed recommended dose (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012)
    C) LEAD ENCEPHALOPATHY
    1) 1500 mg/m(2)/day (approximately 50 to 75 mg/kg/day) is administered as a continuous IV infusion, starting 4 hours after the first dose of dimercaprol and after adequate urine flow is established. The dose, along with dimercaprol therapy, is continued for 5 days, followed by a 2- to 4-day rest period in order to allow redistribution of lead (Howland, 2011).
    D) LEAD NEPHROPATHY
    1) SERUM CREATININE LEVELS BETWEEN 2 AND 3 MG/DL: 500 mg/m(2) IM (divided into equal doses spaced 8 to 12 hours apart) or IV (infused over 8 to 12 hours) every 24 hours for 5 days (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012; Howland, 2011).
    2) SERUM CREATININE LEVELS BETWEEN 3 AND 4 MG/DL: 500 mg/m(2) IM (divided into equal doses spaced 8 to 12 hours apart) or IV (infused over 8 to 12 hours) every 48 hours for 3 doses (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012; Howland, 2011).
    3) SERUM CREATININE LEVELS ABOVE 4 MG/DL: 500 mg/m(2) once weekly IM (divided into equal doses spaced 8 to 12 hours apart) or IV (infused over 8 to 12 hours) (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012; Howland, 2011).
    7.2.2) PEDIATRIC
    A) BLOOD LEVELS BETWEEN 20 AND 70 MCG/DL AND ASYMPTOMATIC
    1) 1000 mg/m(2) IM (divided into equal doses spaced 8 to 12 hours apart) or IV (infused over 8 to 12 hours) daily for 5 days, followed by a 2- to 4-day rest period in order to allow redistribution of lead; a second course of treatment may then be employed as indicated (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012).
    2) DO NOT exceed recommended dose (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012).
    B) BLOOD LEVELS ABOVE 70 MCG/DL OR SYMPTOMATIC
    1) 1000 mg/m(2) (approximately 25 to 50 mg/kg/day) daily for 5 days, followed by a 2- to 4-day rest period in order to allow redistribution of lead; a second course of treatment may then be employed as indicated. Use in conjunction with BAL (dimercaprol) (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012; Howland, 2011).
    2) DO NOT exceed recommended dose (Prod Info Calcium Disodium Versenate intravenous injection, intramuscular injection, 2012)
    C) LEAD ENCEPHALOPATHY
    1) 1500 mg/m(2)/day (approximately 50 to 75 mg/kg/day) is administered as a continuous IV infusion, starting 4 hours after the first dose of dimercaprol and after adequate urine flow is established. The dose, along with dimercaprol therapy, is continued for 5 days, followed by a 2- to 4-day rest period in order to allow redistribution of lead (Howland, 2011).

Minimum Lethal Exposure

    A) In patients with lead encephalopathy, a therapeutic dose may cause worsening cerebral edema, which can be fatal (Prod Info Calcium disodium versenate, 2004).

Maximum Tolerated Exposure

    A) No ill effects were observed following inadvertent administration of 5 times the recommended dose, infused intravenously over a 24 hour period of time, to an asymptomatic 16 month old with a blood lead level of 56 mcg/dL (Prod Info Calcium disodium versenate, 2004).

Workplace Standards

    A) ACGIH TLV Values for CAS62-33-9 (American Conference of Governmental Industrial Hygienists, 2010):
    1) Not Listed

    B) NIOSH REL and IDLH Values for CAS62-33-9 (National Institute for Occupational Safety and Health, 2007):
    1) Not Listed

    C) Carcinogenicity Ratings for CAS62-33-9 :
    1) ACGIH (American Conference of Governmental Industrial Hygienists, 2010): Not Listed
    2) EPA (U.S. Environmental Protection Agency, 2011): Not Listed
    3) IARC (International Agency for Research on Cancer (IARC), 2016; International Agency for Research on Cancer, 2015; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2010a; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2008; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2007; IARC Working Group on the Evaluation of Carcinogenic Risks to Humans, 2006; IARC, 2004): Not Listed
    4) NIOSH (National Institute for Occupational Safety and Health, 2007): Not Listed
    5) MAK (DFG, 2002): Not Listed
    6) NTP (U.S. Department of Health and Human Services, Public Health Service, National Toxicology Project ): Not Listed

    D) OSHA PEL Values for CAS62-33-9 (U.S. Occupational Safety, and Health Administration (OSHA), 2010):
    1) Not Listed

Pharmacologic Mechanism

    A) The therapeutic effects are due to the formation of chelates with divalent and trivalent metals. A stable chelate will form with any metal that can displace calcium from the molecule, such as lead (Prod Info Calcium disodium versenate, 2004).

Molecular Weight

    A) 374.27 (Prod Info Calcium disodium versenate, 2004)

General Bibliography

    1) 40 CFR 372.28: Environmental Protection Agency - Toxic Chemical Release Reporting, Community Right-To-Know, Lower thresholds for chemicals of special concern. National Archives and Records Administration (NARA) and the Government Printing Office (GPO). Washington, DC. Final rules current as of Apr 3, 2006.
    2) 40 CFR 372.65: Environmental Protection Agency - Toxic Chemical Release Reporting, Community Right-To-Know, Chemicals and Chemical Categories to which this part applies. National Archives and Records Association (NARA) and the Government Printing Office (GPO), Washington, DC. Final rules current as of Apr 3, 2006.
    3) 49 CFR 172.101 - App. B: Department of Transportation - Table of Hazardous Materials, Appendix B: List of Marine Pollutants. National Archives and Records Administration (NARA) and the Government Printing Office (GPO), Washington, DC. Final rules current as of Aug 29, 2005.
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