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Pronunciation |
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(sis
a tra KYOO ree
um) |
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U.S. Brand
Names |
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Nimbex® |
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Generic
Available |
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No |
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Synonyms |
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Cisatracurium Besylate |
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Pharmacological Index |
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Neuromuscular Blocker Agent, Nondepolarizing |
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Use |
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Drug for neuromuscular blockade in patients with renal and/or hepatic
failure; eases endotracheal intubation as an adjunct to general anesthesia and
relaxes skeletal muscle during surgery or mechanical ventilation; does not
relieve pain |
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Pregnancy Risk
Factor |
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C |
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Contraindications |
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Hypersensitivity to cisatracurium besylate or any
component |
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Warnings/Precautions |
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Not recommended for rapid sequence intubation; may produce profound effects
in patients with neuromuscular disorders (myasthenia gravis); patients with
severe burns may develop resistance; maintenance of an adequate airway and
respiratory support is critical |
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Adverse
Reactions |
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<1%: Effects are minimal and transient, bradycardia and hypotension,
flushing, rash, bronchospasm |
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Overdosage/Toxicology |
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Symptoms of overdose include respiratory depression, cardiovascular collapse
Neostigmine 1-3 mg slow I.V. push in adults (0.5 mg in children) antagonizes
the neuromuscular blockade, and should be administered with or immediately after
atropine 1-1.5 mg I.V. push (adults). This may be especially useful in the
presence of bradycardia. |
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Drug
Interactions |
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Prolonged neuromuscular blockade:
Inhaled anesthetics:
Halothane has only a marginal effect, enflurane and isoflurane increase the
potency and prolong duration of neuromuscular blockade induced by cisatracurium
Dosage should be reduced by 30% to 40% in patients receiving isoflurane or
enflurane
Local anesthetics
Lithium
Magnesium salts
Antiarrhythmics (eg, quinidine or procainamide)
Antibiotics (eg, aminoglycosides, tetracyclines, vancomycin, clindamycin)
Resistance to neuromuscular blockade: Chronic phenytoin or carbamazepine
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Stability |
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Refrigerate intact vials at 2°C to
8°C/36°F to
46°F; use vials within 21 days upon removal from the
refrigerator to room temperature (25°C to
77°F). Dilutions of 0.1-0.2 mg/mL in 0.9% sodium chloride
or dextrose 5% in water are stable for up to 24 hours at room temperature.
Incompatible with sodium bicarbonate, ketorolac, propofol;
compatible with alfentanil, droperidol, fentanyl, midazolam, and
sufentanil. |
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Mechanism of
Action |
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Blocks neural transmission at the myoneural junction by binding with
cholinergic receptor sites |
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Pharmacodynamics/Kinetics |
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Onset of action: I.V.: 2-3 minutes
Peak effect: Within 3-5 minutes
Duration: Recovery begins in 20-35 minutes when anesthesia is balanced;
recovery is attained in 90% of patients in 25-93 minutes
Metabolism: Some metabolites are active; undergoes rapid nonenzymatic
degradation in the bloodstream, additional metabolism occurs via ester
hydrolysis
Half-life: 22 minutes |
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Usual Dosage |
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I.V. (not to be used I.M.):
Children 2-12 years: Intubating doses: 0.1 mg over 5-15 seconds during either
halothane or opioid anesthesia. ( Note: When given during stable opioid
nitrous oxide/oxygen anesthesia, 0.1 mg/kg produces maximum neuromuscular block
in an average of 2.8 minutes and clinically effective block for 28 minutes.)
Adults: Intubating doses: 0.15-0.2 mg/kg as components of propofol/nitrous
oxide/oxygen induction-intubation technique. ( Note: May produce
generally good or excellent conditions for tracheal intubation in 1.5-2 minutes
with clinically effective duration of action during propofol anesthesia of 55-61
minutes.)
Children greater than or equal to 2 years and Adults: Continuous infusion:
After an initial bolus, a diluted solution can be given by continuous infusion
for maintenance of neuromuscular blockade during extended surgery; adjust the
rate of administration according to the patient's response as determined by
peripheral nerve stimulation. An initial infusion rate of 3 mcg/kg/minute may be
required to rapidly counteract the spontaneous recovery of neuromuscular
function; thereafter, a rate of 1-2 mcg/kg/minute should be adequate to maintain
continuous neuromuscular block in the 89% to 99% range in most pediatric and
adult patients. Consider reduction of the infusion rate by 30% to 40% when
administering during stable isoflurane or enflurane anesthesia. Spontaneous
recovery from neuromuscular blockade following discontinuation of infusion of
cisatracurium may be expected to proceed at a rate comparable to that following
single bolus administration.
Intensive care unit administration: Follow the principles for
infusion in the operating rooms. An infusion rate of ~3 mcg/kg/minute should
provide adequate neuromuscular blockade in adult patients. Following recovery
from neuromuscular block, readministration of a bolus dose may be necessary to
quickly re-establish neuromuscular block prior to reinstituting the infusion;
dosage ranges of 0.5-10 mcg/kg/minute have been reported.
Dosing adjustment in renal impairment: Because slower times to onset
of complete neuromuscular block were observed in renal dysfunction patients,
extending the interval between the administration of cisatracurium and
intubation attempt may be required to achieve adequate intubation conditions.
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Administration |
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Give undiluted as a bolus injection; not for I.M. inject, too much tissue
irritation; continuous administration requires the use of an infusion
pump |
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Monitoring
Parameters |
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Vital signs (heart rate, blood pressure, respiratory
rate) |
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Patient
Information |
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May be difficult to talk because of head and neck muscle
blockade |
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Nursing
Implications |
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Neuromuscular blocking potency is 3 times that of atracurium; maximum block
is up to 2 minutes longer than for equipotent doses of
atracurium |
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Dosage Forms |
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Injection, as besylate: 2 mg/mL (5 mL, 10 mL); 10 mg/mL (20
mL) |
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References |
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Belmont MR, Lien CA, Quessy S, et al,
"The Clinical Neuromuscular Pharmacology of 51W89 in Patients Receiving Nitrous Oxide/Opioid/Barbiturate Anesthesia,"
Anesthesiology, 1995, 82(5):1139-45.
Konstadt SN, Reich DL, Stanley TE 3d, et al,
"A Two Center Comparison of the Cardiovascular Effects of Cisatracurium
(Nimbex®)
and Vecuronium in Patients with Coronary Artery Disease," Anesth Analg,
1995, 81(5):1010-4.
Lien CA, Belmont MR, Abalos A, et al,
"The Cardiovascular Effects and Histamine-Releasing Properties of 51W89 in Patients Receiving Nitrous Oxide/Opioid/Barbiturate Anesthesia,"
Anesthesiology, 1995, 82(5):1131-8.
Prielipp RC, Coursin DB, Scuderi PE, et al,
"Comparison of the Infusion Requirements and Recovery Profiles of Vecuronium and Cisatracurium 51W89 in Intensive Care Unit Patients,"
Anesth Analg, 1995, 81(1):3-12.
Sorooshian SS, Stafford MA, Eastwood NB, et al,
"Pharmacokinetics and Pharmacodynamics of Cisatracurium in Young and Elderly Adult Patients,"
Anesthesiology, 1996, 84(5):1083-91.
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