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

This table summarizes information useful in the interpretation of drugs-of-abuse assays. It was originally developed by the late Daniel M. Baer, MD, and updated by Richard A. Paulson, MT(ASCP), supervisor of Chemistry and Toxicology, VA Medical Center, Portland, OR. The table has been updated annually for CLR since 2001-2002 by Robert H. Williams, PhD, D(ABCC), F(ACB), MT(ASCP), CQA(ASQ), clinical associate professor of Pathology, University of South Florida, in Tampa, FL.