Trazodone Drug Level
Commercial Mail-out Laboratory
Timing of specimen collection: Pre-dose (trough) draw – At steady state
concentration. Separate serum from cells as soon as possible.
|Red top tube 5 mL (Clot Activator)
Preferred Minimum: 1.0 mL serum
Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS
or ACD solution).
Submit specimen to laboratory as soon as possible after collection.
1-5 days upon receipt at reference laboratory.
Therapeutic range: 0.5-2.5 μg/mL
Toxic: > 4 μg/mL
Quantitative Liquid Chromatography-Tandem Mass Spectrometry