Drug Screen Test – Reference Range

Results of tests must be carefully interpreted in conjunction with signs and symptoms.

There are established therapeutic and potentially toxic levels for many drugs, but people may experience serious side effects or have symptoms of a drug overdose even when concentrations of drugs are at normal or therapeutic levels.

It should be noted that established levels and the units that are used to report them will differ slightly from source to source.

It is important to evaluate concentrations in accordance with the testing laboratory’s reference ranges.

Examples of therapeutic and toxic levels for some drugs in adults include:

  • Acetaminophen: therapeutic level is 10-20 mcg/mL
  • Aspirin (Salicylic acid, salicylate): therapeutic level for pain relief is 10-100 mcg/mL
  • Ethanol: greater than 80 mg/dL (>0.08%)

Keywords: durg screen; Drug Testing; Emergency and Overdose Drug Testing; Poison Testing; Toxicology Assays

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.