High Turbulence Liquid Chromatography–Tandem Mass Spectrometry (HTLC-MS/MS)
Therapeutic Drug Monitoring
Therapeutic: >40 mcg/mL; Elimination: <0.020 mcg/mL
3 - 7 days
Collect specimen in a red top (preferred) or SST tube. Centrifuge and aliquot serum into a plastic vial within 2 hours of collection. Store and transport at room temperature (preferred); specimen may be stored refrigerated or frozen for up to 14 days.
Test sent to Mayo Medical Laboratories.