Citalopram, Serum or Plasma

TEST: 808358
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CPT: 80299
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Synonyms

  • Celexa®

Expected Turnaround Time

5 - 10 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

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. Specimen is stable for four days at room temperature, for four days refrigerated, and for 70 days frozen.

Patient Preparation

Trough levels are most reproducible.

Causes for Rejection

Gel-barrier tubes

Test Details

Use

Therapeutic drug management

Methodology

High-pressure liquid chromatography with fluorescence detection (HPLC-FL)

Reference Interval

Steady-state plasma concentrations of citalopram in patients receiving recommended daily dosages: up to 120 ng/mL. Desmethylcitalopram concentrations are typically around one-third of the citalopram concentration.

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
808358 Citalopram (Celexa) 808359 Citalopram ng/ml 34635-3
808358 Citalopram (Celexa) 808362 Desmethylcitalopram ng/ml 35106-4

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