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Naproxen

Naprosyn^®, Anaprox^®, Aleve

Test Codes

EPIC: LAB6112, Mayo: ZW80, MedTox: 366

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One plain Red-top tube.

Do not use Serum Separator Tubes.

Physician Office/Draw Specimen Preparation

Let serum specimens clot then immediately centrifuge to separate serum from cells. Transfer serum to 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). (Minimum: 0.2 mL)

Rejection Criteria

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

In-Lab Processing

Let serum specimens clot then immediately centrifuge to separate serum from cells. Transfer serum to plastic transport tube and refrigerate (2-8°C or 36-46°F).

Transport: 1.0 mL serum or plasma, refrigerated (2-8°C or 36-46°F). (Minimum: 0.2 mL)

Storage

Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 72 hours
Refrigerated (2-8°C or 36-46°F): 7 days
Frozen (-20°C/-4°F or below): 7 days

Specimen Storage in Department Prior to Disposal:

Specimen retention time is determined by the policy of the reference laboratory. Contact the Send Outs Laboratory with any questions.

Laboratory

Sent to Mayo Clinic Laboratories in Rochester, MN. Forwarded to MedTox Laboratories.

Performed

Varies.

Reference Range

By report.

Test Methodology

High Performance Liquid Chromatography (HPLC) with ultraviolet detection.

Interpretation

By report.

Clinical Utility

This assay aids in the therapeutic drug monitoring of Naproxen (Naprosyn^®) a nonsteroidal anti-inflammatory drug. Naprosyn^® is indicated for the treatment of rheumatoid arthritis, osteoarthritis, ankylosing spondylitis and juvenile arthritis. Naprosyn^® is also indicated for the treatment of tendinitis, bursitis, acute gout, and for the management of pain and primary dysmenorrhea.

CPT Codes

80329

Contacts

Last Updated

10/8/2023