Gas Chromatography (GC)
Therapeutic drug monitoring.
Collect specimen in a red top tube; do not use SST tube. Centrifuge, aliquot serum into a plastic vial and freeze. Protect specimen from light. EDTA (lavender top) or heparinized (green top) plasma is also acceptable.
Protect specimen from light.
Test sent to Mayo Medical Laboratories; performed by NMS Labs.