Details

Hydroxychloroquine Level

Plaquenil™ , NMS #2362SP, Order as a Miscellaneous Sendout.

Specimen Collection Criteria

Collect (preferred specimen): One plain Red-top tube.
Also acceptable: One Lavender-top EDTA tube.

Do not use Serum Separator Tubes.
Time of Collection: Trough, just prior to the next dose.

Physician Office/Drawsite Specimen Preparation

Centrifuge to separate serum or plasma from cells. Transfer serum or plasma to a plastic transport tube and refrigerate (2-8°C or 36-46°F).

Preparation for Courier Transport

Transport: 1.0 mL serum or plasma, refrigerated (2-8°C or 36-46°F). (Min: 0.4 mL)

Rejection Criteria

  • Serum Separator (SST) tubes.
  • Specimens not collected and processed as indicated.

Performed

Thursday.
Results available in 4-11 days.

Reference Range

By report.

Test Methodology

High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS).

Interpretation

By report.

Clinical Utility

This assay aids in the therapuetic monitoring of Plaquenil¿ anantimalarial drug that also exerts a beneficial effect in lupus erythematosus (chronic discoid or systemic) and acute or chronic rheumatoid arthritis. It is indicated for the suppressive treatment and treatment of acute attacks of malaria due to Plasmodium vivax, P. malariae, P. ovale, and susceptible strains of P. falciparum. It is also indicated for the treatment of discoid and systemic lupus erythematosus, and rheumatoid arthritis.

CPT Code

80375.

Test Codes

NMS #2362SP, Order as a Miscellaneous Sendout.

Last Updated

7/11/2019