Casandra
Casandra Test Code LC67141Version 1 (DRAFT)
Performing Lab
Dextromethorphan (DM), Serum or Plasma
Also known as: Methorphan
Clinical Use
Order TestUse
Therapeutic drug management; detect presence of dextromethorphan, an over-the-counter cough suppressant with abuse potential
Special Instructions
Not provided.
Limitations
Not provided.
Test Details
Methodology
Mass Spectrometry
Biomarkers
Dextromethorphan
AnalyteDextromethorphan • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)
LOINC Codes
Order Codes
- 13623-4
Result Turnaround Time
5-10 days
Related Documents
For more information, please review the documents below
Specimen Requirements
Specimen
Plasma
Volume
2 mL
Minimum Volume
0.5 mL
Container
Red‑top tube or green‑top (heparin) tube (gel‑barrier tubes not recommended)
Collection Instructions
Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube.
Patient Preparation
Trough levels are most reproducible.
Storage Instructions
Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.
Causes for Rejection
Gel‑barrier tubes
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Three days |
| Refrigerated | Two weeks |
| Frozen | Two weeks |