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  • Title: A rapid and sensitive high-performance liquid chromatography assay for rofecoxib in human serum.
    Author: Aravind MK, Prescilla R, Ofenstein JP.
    Journal: J Chromatogr Sci; 2002 Jan; 40(1):26-8. PubMed ID: 11866383.
    Abstract:
    Rofecoxib is a selective cyclooxygenase (COX)-2 inhibitor that is approved for the treatment of acute pain and osteoarthritis in adults. A sensitive and rapid high-performance liquid chromatographic (HPLC) method of determining rofecoxib in human serum is described. Alkalinized plasma samples are extracted into an organic solvent containing an internal standard and evaporated under nitrogen. The dried sample residues are reconstituted with mobile phase and analyzed by HPLC. The method uses 100 microL of the sample and is linear from 20 to 2000 ng/mL of rofecoxib. Precision and accuracy studies are performed. Stability of the drug in serum over four weeks is documented. This new method is simple, sensitive, precise, and accurate. Its use will translate into faster laboratory turnaround time, and the small sample volume required (100 microL) makes this assay suitable for pediatric patients. This assay will expedite pharmacokinetic studies and the therapeutic drug monitoring of rofecoxib and possibly other COX-2 inhibitors.
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