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Beaumont Laboratory


Aldactone, Aldactazide, Canrenone, NMS #4207, Order as a Miscellaneous Sendout.

Specimen Collection Criteria

Collect (preferred specimen): One plain Red-top tube.
Also acceptable: One Lavender-top EDTA tube. (Min: 0.7 mL)

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

  • Specimens collected in SST tubes.
  • Specimens not collected and processed as indicated.


Specimen Stability for Testing:

Room Temperature (20-26°C or 68-78.8°F): 2 days
Refrigerated (2-8°C or 36-46°F): 1 month
Frozen (-20°C/-4°F or below): 12 months

Specimen Storage in Department Prior to Disposal:

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


Sent to ARUP Laboratories, Salt Lake City, UT, forwarded to National Medical Services (NMS), Willow Grove, PA.


Results available in 3-10 days.

Reference Range

By report.

Test Methodology

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


Spironolactone is a mild diuretic agent. Spironolactone is used to treat edema, particularly that due to cirrhosis of the liver, and to treat hypertension.

Clinical Utility

This assay is used for the therapeutic monitoring and toxicity assessment of spironolactone and it's metabolite (canrenone).

CPT Code


Test Codes

NMS #4207, Order as a Miscellaneous Sendout.

Last Updated


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This directory currently reflects information only for specimens collected and/or processed at the Farmington Hills, Grosse Pointe, Royal Oak, and Troy campuses.