Sign in →

Test ID DULOX Duloxetine, Serum

Reporting Name

Duloxetine, S

Useful For

Monitoring serum concentration during therapy 


Evaluating potential toxicity 


Evaluating patient compliance

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum Red

Specimen Required

Container/Tube: Red top

Specimen Volume: 1 mL

Collection Instructions: 

1. As is the case for most therapeutic drugs, trough specimens are preferred for monitoring duloxetine concentrations and should be drawn immediately before the next scheduled dose.

2. Spin down within 2 hours of draw.

Specimen Minimum Volume

0.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Refrigerated (preferred) 14 days
  Frozen  14 days
  Ambient  24 hours

Reference Values

60-120 ng/mL

Day(s) and Time(s) Performed

Wednesday; 4 p.m.

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information


G0480 (if appropriate)

Reject Due To


Mild OK; Gross OK


Mild OK; Gross OK


Mild OK; Gross OK


Serum gel tube


Method Name

High-Turbulence Liquid Chromatography Mass Spectrometry (HTLC-MS/MS)