Screening: Methamphetamine is typically detected through urine and blood screens that offer positive or negative (“qualitative”) results. A positive result on a screen often leads to a confirmatory test that will use more sophisticated laboratory tests which can quantitate the concentration of the drug and drug metabolites.

Interpreting screening and confirmatory testing results can be complex as a result of test cut-offs and patterns of use. Urine is most frequently used for screening because it is less invasive to obtain than blood samples. Also, the kidneys filter and concentrate chemicals during the excretion process. As a result, urine tests can detect substances that may have much lower concentration in the blood.


This month’s criminal topic is the Methamphetamine Toxicology. Topics covered are:

  • What will trigger a drug screen (6/2/16)
  • Screening for Meth (6/9/16)
  • Blood Toxicology (6/16/16)
  • Detecting Meth (6/23/16)

Note: To see all posts in this topic, click here.

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