Flecainide Level

Tambocor

Test Codes

EPIC: LAB687, Beaker: Flecainide, CHW: LAB687

Department

Send Outs

Specimen Collection Criteria

Collect (preferred specimen): One Gray-top (Potassium oxalate and Sodium Fluoride) tube.

Also Acceptable: One plain Red-top tube.

Physician Office/Draw Specimen Preparation

Let specimen clot 30-45 minutes then centrifuge to separate serum or plasma from cells. Transfer serum or plasma to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Preparation for Courier Transport

Transport: 2.0 mL serum, at room temperature (20-26°C or 68-78.8°F). (Minimum: 0.5 mL)

Rejection Criteria

Specimens not collected and processed as indicated.

In-Lab Processing

Let specimen clot 30-45 minutes then centrifuge to separate serum or plasma from cells. Transfer serum or plasma to plastic transport tube and maintain at room temperature (20-26°C or 68-78.8°F) prior to transport.

Transport: 2.0 mL serum, at room temperature (20-26°C or 68-78.8°F). (Minimum: 0.5 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): 14 days

Specimen Storage in Department Prior to Disposal: 7 days

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

Laboratory

Sent to Corewell Health Reference Laboratory, Grand Rapids, MI.

Performed

Available 24 hours.
Results available in 1 day.

Reference Range

Suggested therapeutic range: 200 – 1000 ng/mL

Test Methodology

Liquid Chromatography / Mass Spectrometry (LC/MS)

Interpretation

By report.

Clinical Utility

Flecainide – Monitoring the Flecainide concentration is used to assure compliance and avoid toxicity of this cardiac drug used to treat ventricular tachycardia and premature contractions.

CPT Codes

80181

Contacts

Last Updated

3/4/2026