Test Overview
Test Methodology
Liquid-Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Test Usage
Monitor therapeutic drug level.
Reference Range *
Trimethoprim: >2.0 mcg/mL; Sulfamethoxazole: >50 mcg/mL
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Details
Days Set Up
Monday, Thursday
Analytic Time
2 - 7 days
Soft Order Code
MMLR
Synonyms
- Trimethoprim
- Sulfamethoxazole
- CO-Trimoxazone
- Cotrimoxazole
- Septra
- Bactrim
Laboratory
Sendout
Reference Laboratory
Mayo TMP (80146) Trimethoprim, SFZ (8238) Sulfamethoxazole
Section
Special Testing
Specimen Requirements
Collection Instructions
Collect specimen in a red top tube; do not use SST tube. Centrifuge, aliquot serum into a plastic vial, and freeze within 2 hours of collection.
Normal Volume
1 mL serum
Minimum Volume
0.5 mL serum
Rejection Criteria
SST tube not acceptable.
Additional Information
Test sent to Mayo Medical Laboratories.
Billing
CPT Code
80299 x2