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  • Title: Stability and availability of cyclosporine in 5% dextrose injection or 0.9% sodium chloride injection.
    Author: Ptachcinski RJ, Logue LW, Burckart GJ, Venkataramanan R.
    Journal: Am J Hosp Pharm; 1986 Jan; 43(1):94-7. PubMed ID: 3953588.
    Abstract:
    The stability of cyclosporine in commonly used i.v. solutions and the percentage of the drug delivered via polyvinyl chloride administration tubing were studied. Cyclosporine injection was prepared according to the manufacturer's instructions and diluted with 5% dextrose injection (D5W) or with 0.9% sodium chloride injection (NS). Admixtures containing cyclosporine 2 mg/mL were prepared in polyvinyl chloride minibags (five for each solution) and in glass containers (three for each solution). The sample obtained at time zero from a glass container protected from light was the control. Additional samples were prepared in minibags and run through 70-inch polyvinyl chloride administration sets. An HPLC assay for cyclosporine was used. Exposure to room light did not significantly affect cyclosporine concentrations. More than 90% of the initial drug concentration remained after 24 hours under all storage conditions, but less than 95% remained after 6 hours in samples diluted with NS and stored in plastic. At times up to 60 minutes, cyclosporine concentrations were significantly different in solutions infused from the minibags through polyvinyl chloride tubing from those in control solutions. Under these conditions, cyclosporine is stable in D5W in glass containers or polyvinyl chloride minibags for 24 hours and in NS for 6 hours (polyvinyl chloride) to 12 hours (glass). However, because of the potential for leaching of plasticizers, cyclosporine admixtures should be stored in glass or used within six hours if stored in polyvinyl chloride minibags. Approximately 10% of the initial drug concentration is lost to 70-inch length polyvinyl chloride infusion tubing.
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