cisatracurium - Medication Listings

Cisatracurium Besylate Injection, USP is a nondepolarizing skeletal neuromuscular blocker for intravenous administration. Compared to other neuromuscular blockers, it is intermediate in its onset and duration of action. Cisatracurium Besylate Injection, USP contains cisatracurium besylate as the active pharmaceutical ingredient. Cisatracurium besylate is one of 10 isomers of atracurium besylate and constitutes approximately 15% of that mixture. Cisatracurium besylate is [1 R -[1α,2α(1' R *,2' R *)]]-2,2'-[1,5-pentanediylbis[oxy(3-oxo-3,1-propanediyl)]]bis[1-[(3,4-dimethoxyphenyl)methyl]-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methylisoquinolinium] dibenzenesulfonate. The molecular formula of the cisatracurium parent bis-cation is C 53 H 72 N 2 O 12 and the molecular weight is 929.2. The molecular formula of cisatracurium as the besylate salt is C 65 H 82 N 2 O 18 S 2 and the molecular weight is 1243.50. The structural formula of cisatracurium besylate is: The log of the partition coefficient of cisatracurium besylate is -2.12 in a 1-octanol/distilled water system at 25°C. Cisatracurium Besylate Injection, USP 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 dose 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). Cisatracurium should be refrigerated at 2°C to 8°C (36°F to 46°F) in the tray 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 cisatracurium within 21 days, even if re-refrigerated. Cisatr-struc-01.jpg