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Therapeutic drug management
High-pressure liquid chromatography with ultraviolet detection (HPLC/UV)
Plasma insulin concentrations have been shown to increase only when plasma glipizide concentrations exceeded 200 ng/mL.
Serum or plasma
Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube.
Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.
Causes for Rejection