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Nimbex

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Nimbex

NIMBEX®
(cisatracurium besylate) Injection

This drug should be administered only by adequately trained individuals familiar with its actions, characteristics, and hazards.

NOT FOR USE IN NEONATES
CONTAINS BENZYL ALCOHOL

Nimbex

DRUG DESCRIPTION

NIMBEX (cisatracurium besylate) is a nondepolarizing skeletal muscle relaxant for intravenous administration. Compared to other neuromuscular blocking agents, it is intermediate in its onset and duration of action. Cisatracurium besylate is one of 10 isomers of atracurium besylate and constitutes approximately 15% of that mixture. Cisatracurium besylate is [1R-[1α,2α(1'R*,2'R*)]]-2,2'-[1,5­pentanediylbis[oxy(3-oxo-3,1-propanediyl)]]bis[1-[(3,4-dimethoxyphenyl)methyl]-1,2,3,4-tetrahydro­6,7-dimethoxy-2-methylisoquinolinium] dibenzenesulfonate. The molecular formula of the cisatracurium parent bis-cation is C53H72N2O12 and the molecular weight is 929.2. The molecular formula of cisatracurium as the besylate salt is C65H82N2O18S2 and the molecular weight is 1243.50. The structural formula of cisatracurium besylate is:

NIMBEX®
(cisatracurium besylate) Structural Formula Illustration

The log of the partition coefficient of cisatracurium besylate is -2.12 in a 1-octanol/distilled water system at 25°C.

NIMBEX (cisatracurium besylate) Injection is a sterile, non-pyrogenic aqueous solution provided in 5 mL, 10 mL, and 20 mL vials. The pH is adjusted to 3.25 to 3.65 with benzenesulfonic acid. The 5 mL and 10 mL vials each contain cisatracurium besylate, equivalent to 2 mg/mL cisatracurium. The 20 mL vial, intended for ICU use only, contains cisatracurium besylate, equivalent to 10 mg/mL cisatracurium. The 10 mL vial, intended for multiple-dose use, contains 0.9% benzyl alcohol as a preservative. The 5 mL and 20 mL vials are single-use vials and do not contain benzyl alcohol.

Cisatracurium besylate slowly loses potency with time at a rate of approximately 5% per year under refrigeration (5°C). NIMBEX (cisatracurium besylate) should be refrigerated at 2° to 8°C (36° to 46°F) in the carton to preserve potency. The rate of loss in potency increases to approximately 5% per month at 25°C (77°F). Upon removal from refrigeration to room temperature storage conditions (25°C/77°F), use NIMBEX (cisatracurium besylate) within 21 days, even if rerefrigerated.

What are the possible side effects of cisatracurium (Nimbex)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Tell your caregivers right away if you have any of these serious side effects:

  • slow heart rate;
  • noisy breathing, feeling short of breath;
  • ongoing muscle weakness; or
  • inability to move your muscles.

Less serious side effects may include:

  • feeling light-headed;
  • mild itching or skin rash; or
  • warmth, redness, or tingly feeling under your...

Read All Potential Side Effects and See Pictures of Nimbex »

Last reviewed on RxList: 1/4/2011
This monograph has been modified to include the generic and brand name in many instances.

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Report Problems to the Food and Drug Administration

 

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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