Four-year evaluation of drug-impaired driving drug concentrations.

Drug-impaired driving is a significant public health and safety concern in the USA. To help assess current patterns of drug use in drivers, we evaluated 4 years of drug positivity in a large cohort of suspected impaired drivers. Samples collected between January 2017 and December 2020 were tested via a method compliant with the National Safety Council's Alcohol, Drugs, and Impairment Division's Tier I scope of recommended drugs.

Determination of Cross-Reactivity of Novel Psychoactive Substances with Drug Screen Immunoassays Kits in Whole Blood.

The purpose of this study was to examine the impact of 59 novel psychoactive compounds on common enzyme-linked immunosorbent assay (ELISA) testing kits. Concentrations above and below the individual kit reporting limits in each class were measured. Compounds that exhibited cross-reactivity were then spiked individually using a seven-point response curve to determine the level of cross-reactivity.

Impact of Expanding ELISA Screening in DUID Investigations to Include Carisoprodol/Meprobamate and Zolpidem.

In 2013, the National Safety Council's Alcohol Drugs and Impairment Division added zolpidem and carisoprodol and its metabolite meprobamate to the list of Tier 1 drugs that should be tested for in all suspected drug impaired driving and motor vehicle fatality investigations. We describe the validation of an enzyme linked immunosorbent assays (ELISA) for both drugs in whole blood, and the utilization of the ELISA to assess their positivity in a sample of 322 suspected impaired driving cases that was retrospectively screened using the validated assays. The occurrence of carisoprodol/meprobamate was found to be 1.