Test directory: Metformin

Ordering Code 8520
Test Name Metformin
Alias Glucophage
Preferred Specimen Serum
Preferred Container Plain (Red)
Other Specimen/Container Plasma in EDTA, K2 (Lavender)
Optimum Volume 1 mL
Handling Instructions Promptly centrifuge and separate Serum or Plasma into aliquot tube
Specimen is forwarded to another lab for testing;
DO NOT share with other tests.
Transport Requirements Oahu: Ambient
Airline: Frozen
Specimen Stability Ambient: 1 Month
Refrigerated: 1 Month
Frozen: 24 Months
Rejection Criteria Gel barrier tube
Avail. Stat NO
Analytic Time 14 Days
Methodology High Performance Liquid Chromatography/Tandem
Mass Spectrometry (LC-MS/MS)
Reference Lab  Quest Diagnostic Lab-NI

Reference range(s)

The reference ranges listed below are valid on this date of March 18, 2026.
Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Metformin ALL mcg/mL

Therapeutic...
Therapeutic range:  Approximately 1-2 mcg/mL
Metformin associated lactic acidosis generally
has been associated with Metformin plasma
concentrations exceeding 5 mcg/mL.
 
Analysis by High Performance Liquid Chromatography/
Tandem Mass Spectrometry (LC-MS/MS)
 
This test was developed and its performance characteristics
determined by NMS Labs.  It has not been cleared or
approved by the US Food and Drug Administration.                      
+
See report.
Note1

Note1:


Therapeutic range:  Approximately 1-2 mcg/mL
Metformin associated lactic acidosis generally
has been associated with Metformin plasma
concentrations exceeding 5 mcg/mL.
 
Analysis by High Performance Liquid Chromatography/
Tandem Mass Spectrometry (LC-MS/MS)
 
This test was developed and its performance characteristics
determined by NMS Labs.  It has not been cleared or
approved by the US Food and Drug Administration.                      
+
See report..