Metoprolol, Serum or Plasma

CPT: 80375
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Synonyms

  • Lopressor®
  • Toprol®

Expected Turnaround Time

10 - 14 days



Specimen Requirements


Specimen

Serum or plasma


Volume

2 mL


Minimum Volume

0.5 mL


Container

Red-top tube or green-top (heparin) tube. Gel-barrier tubes are not recommended.


Collection

Serum or plasma should be separated from cells within two hours of venipuncture. Submit serum or plasma in a plastic transport tube.


Storage Instructions

Submission/transport (<3 days): Room temperature. For storage beyond three days, specimen should be refrigerated or frozen.


Patient Preparation

Trough levels are most reproducible.


Causes for Rejection

Gel-barrier tubes


Test Details


Use

Therapeutic drug management


Methodology

Liquid chromatography/tandem mass spectrometry (LC/MS-MS)


Reference Interval

30−280 ng/mL


LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
811547 Metoprolol (Lopressor) 808274 Metoprolol (Lopressor) ng/ml 3815-8

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