Collect red top/3.0 mL serum, centrifuge, transfer serum to a screw top transport tube, indicate sample type on tube and send refrigerated.
Alternate sample: Sodium or lithium heparin. Sample must be centrifuged and transferred to a screw top transport tube before sending.
Liquid Chromatrography/Tandem Mass Spectrometry
Room temp: 8 hours, Refrigerated: 5 days, Frozen: 30 days
4-6 days, Performed Tuesday-Saturday.
Evaluate toxicity; monitor therapeutic levels