Friday, June 23, 2023

Clobazam, norclobazam and ratio, serum

Reference values Modification and Sample

Test code: 983
Nemonic code: CLNC

Effective update from 03/07/2023




PREVIOUS

NEW
Clobazam:
      Therapeutic level: 30 - 300 µg/L
      Toxicity: Greater than 500 µg/L
      Limit of quantification: 10 µg/L
Norclobazam:
      Therapeutic level: 300 - 3000 µg/L
      Limit of quantification: 50 µg/L
      Ratio Norclobazam/Clobazam: Less than 10
      NOTE:
      Norclobazam / Clobazam ratio is useful for obtaining information on
      drug metabolization capacity and improve dose adjustment.
      Very high ratios (> 25) indicate that the patient is a slow metabolizer of the
      CYP2C19 (if you are not taking CYP3A-inducing drugs or CYP2C19 inhibitors).
      Note: The presence of Norclobazam should be assessed only in the case of therapy
      without Clonazepam, since it interferes in the analysis.








Sample:
    Room Temperature: 2 weeks
    Refrigerated: 2 weeks
    Frozen: 2 months    
     
Version of Test: 13
     

Clobazam:
      Therapeutic level: 30 - 300 µg/L
      Toxicity: Greater than 500 µg/L
      Limit of quantification: 10 µg/L
Norclobazam:
      Therapeutic level: 300 - 3000 µg/L
     Toxicity: Greater than 5000 µg/L
      Limit of quantification: 50 µg/L
      Ratio Norclobazam/Clobazam: Less than 10
      NOTE:
      Norclobazam / Clobazam ratio is useful for obtaining information on
      drug metabolization capacity and improve dose adjustment.
      Very high ratios (> 25) indicate that the patient is a slow metabolizer of the
      CYP2C19 (if you are not taking CYP3A-inducing drugs or CYP2C19 inhibitors).
      Note: The presence of Norclobazam should be assessed only in the case of therapy
      without Clonazepam, since it interferes in the analysis.

* Source: M. Schulz, A. Schmoldt, H. Andresen-Streichert, S. Iwersen-Bergmann. Revisited: Therapeutic and toxic blood concentrations of more than 1,100 drugs and other xenobiotics. Critical Care 2020   

Sample:
    Refrigerated: 1 week
    Frozen: 3 months      
         
Version of Test: 14
     


   Find the record of the test by clicking here

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