| Preferred specimen: |
1.0 mL serum, red top tube. Do not collect in gel-barrier tube. Remove serum from cells within 2 hours of collection and transfer to a plastic transport tube. |
| Minimum specimen: |
0.5 mL serum or plasma |
| Notes: |
Timing of specimen collection: Pre-dose (trough) draw - At steady state concentration. |
| Acceptable specimen: |
1.0 mL plasma, lavender (EDTA), green (sodium or lithium heparin), or gray (sodium fluoride/potassium oxalate) top tube. Remove plasma from cells within 2 hours of collection and transfer to a plastic transport tube. |
| Unacceptable specimen: |
Whole blood. Gel separator tubes, light blue (citrate) or yellow (SPS or ACD solution) tubes. |
| Transport temp: |
Refrigerated |
| Methodology: |
Quantitative Liquid Chromatography-Tandem Mass Spectrometry |
| Unit Code: |
832600 |
| Ref Range: |
Therapeutic Range: 0.5-2.0 ng/mL
Toxic: Not well established |
| Reported: |
2-6 days |
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