Cut-off and toxicity levels for drugs-of-abuse testing

Medical Laboratory Observer, August, 2007

This table summarizes information useful in the interpretation of drugs-of-abuse assays. It was developed by Daniel M. Baer, MD, professor emeritus of pathology, Oregon Health Sciences University, Portland OR, and updated by Richard A. Paulson, MT(ASCP), supervisor of chemistry and toxicology, VA Medical Center, Portland, OR, The table was updated for CLR 2007-2008 by Robert H.

Williams, PhD, DABCC, FACB, MT(ASCP), Clinical Scientist/Consultant, Quest Diagnostics, Inc. and Clinical Associate Professor of Pathology, University of South Florida, both in Tampa, FL.