Live Session: Toxicology: Drug Testing in Addiction Medicine (July 2026)-Toxicology: Drug Testing in Addiction Medicine Presentation

Toxicology: Drug Testing in Addiction Medicine Presentation

Pdf Summary

This presentation reviews the role of drug testing in addiction medicine, with a focus on urine drug screens. It explains the history of toxicology testing, key technologies, and why testing is used: to screen for substance use, support treatment planning, monitor adherence, and help assess abstinence or diversion. It emphasizes that drug testing should be patient-centered, not punitive, and should never be the sole basis for clinical decisions or discharge from care.<br /><br />The talk covers when testing may be inappropriate, including universal screening without a clinical rationale, overly broad panels, and automatic confirmatory testing. It also highlights health inequities in testing practices and urges individualized decision-making. Different biological matrices are reviewed, including blood, breath, oral fluid, sweat, hair, and urine, with urine described as the most established clinical tool but vulnerable to tampering.<br /><br />A major section explains presumptive versus confirmatory testing. Presumptive immunoassays are inexpensive and useful at the point of care, but can have false positives and false negatives. Confirmatory testing with GC-MS or LC-MS is recommended for unexpected results. The presentation reviews detection windows for common substances, common false-positive causes, and important interpretation issues for opioids, benzodiazepines, fentanyl, alcohol biomarkers, stimulants, and buprenorphine metabolites.<br /><br />Several case examples illustrate practical interpretation, such as unexpected negative opioid screens, benzodiazepine metabolism differences, methadone metabolism, and buprenorphine diversion concerns. Special populations are discussed, including adolescents and pregnant patients, with attention to consent, confidentiality, legal risks, and the need for screening by history rather than testing alone. Overall, the session stresses careful interpretation, communication with patients, and using testing to improve care and safety.

Keywords

drug testing

addiction medicine

urine drug screens

toxicology testing

confirmatory testing

immunoassays

GC-MS

LC-MS

patient-centered care

substance use monitoring