EVIDENCE LIBRARY
Browse source-supported forensic toxicology guides in this subject area.
Oct 20, 2026
A 25-person crossover trial found greater simulator driving changes after edible THC plus 0.05% breath alcohol, often without significant sobriety-test changes.
Read guideOct 20, 2026
A 2015 THC electrode experiment detected 0.50 µM in synthetic saliva—not people. See why theoretical nanomolar buffer limits cannot prove roadside accuracy.
Read guideOct 20, 2026
Three minipigs received oral CBD. Plasma and gut THC and 11-OH-THC stayed below assay limits. Learn what that means—and does not prove—for forensic tests.
Read guideOct 20, 2026
Can urine fluorescence identify THC? A primary 2023 study of four analytes reveals spectral overlap, mixed-model LOQs, and limits of a four-donor validation.
Read guideOct 20, 2026
In TMEV-infected mice, CBD 150 mg/kg reduced observed seizures two hours after injection, not nine hours. Read the primary study, safety signals and limits.
Read guideOct 20, 2026
A primary cold-water immersion study in 15 cannabis users found higher glycerol and fatty acids but no significant rise in plasma THC. Matrices, tasks and limits explained.
Read guideOct 20, 2026
A 65-user cannabis concentrate study found slower arm and leg movement and acute sway changes, but tapping nulls and weak plasma THC correlations cannot diagnose impairment.
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Short answer: In a 2025 experiment using male Swiss mice, oral nanoemulsions containing cannabidiol (CBD), delta-9-tetrahydrocannabinol (THC), or a 1:1 combination improved selected seizure outcomes after chemically induced challenges. In a repeated-challenge experiment, CBD at 10 mg/kg and CBD–THC combinations at 1.5 or 3 mg/kg delayed severe seizure development, but the 6 mg/kg combination did […]
Read guideOct 20, 2026
In 190 frequent cannabis users, 10 had whole-blood THC ≥5 ng/mL after requested abstinence. Simulator cutpoints did not separate groups in 187 users.
Read guideOct 20, 2026
A controlled 58-woman study found 15 mg oral THC reduced difficult-task choices, but 7.5 mg was nonsignificant. Separate motivation, motor speed, and blood testing.
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