ARUP's Laboratory Test Directory

Quetiapine, Serum or Plasma : 2003118

Mnemonic: QUETIAP

Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed: Tue, Fri
Reported: 1-5 days
Specimen Required: Collect: Plain red. Also acceptable: Lavender (K2 or K3EDTA) or pink (K2 EDTA).

Specimen Preparation: Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution).

Stability (collection to initiation of testing): Ambient: 1 week; Refrigerated: 1 month; Frozen: 1 month

Interpretive Data: The following therapeutic ranges and toxic values have been suggested, but not validated.

See Compliance Statement B: www.aruplab.com/CS
 
Predose Draw (Trough) - Preferred
Therapeutic range 70-170 ng/mL
Toxic: Greater than 1000 ng/mL

 
Peak Draw (1.5 hour post dose Not recommended)
Therapeutic range 100-1000 ng/mL
Toxic: Greater than 1500  ng/mL

CPT Code(s): 80299
Cross References: Quetiapine (Seroquel®), Serum or Plasma