EVIDENCE LIBRARY
Browse source-supported forensic toxicology guides in this subject area.
Oct 20, 2026
A 16-person crossover study tested dexamphetamine and alcohol: simulated lane weaving, crossings, collisions, breath-estimated BAC and measured venous stimulant.
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Original 22-man trial: repeated dextroamphetamine altered caudate and amygdala fMRI signals without drug-specific gains in gambling-task reaction speed.
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A 32-person aircrew crossover compared oral modafinil and caffeine using measured plasma, vigilance lapses and tracking. What improved—and what did not?
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Primary fly experiments link Fusobacterium nucleatum, butyrate, HDAC1 and dopamine transport to amphetamine responses—not human blood levels or legal impairment.
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What a four-arm trial of 32 men found about neurofeedback, swimming, EEG delta/alpha ratios and cue-induced craving—and what it cannot prove about intoxication.
Read guideOct 20, 2026
In 44 men in methamphetamine rehabilitation, Tai Chi lowered a drug-cue bias score and choice reaction time versus running, but not craving. Source-based limits.
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A 63-woman rehabilitation trial compared 12 weeks of dance and cycling on drug-cue attention and EEG. We separate actual improvements from nonsignificant ERP results and unmeasured blood drugs.
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Primary 2018 research: dextroamphetamine improved 5-choice target detection in 71 adults and 32 mice, but not every response measure or driver impairment.
Read guideOct 20, 2026
An original study compared resting EEG microstates in 55 adults with methamphetamine use disorder and 27 controls. Review cognitive results, real nulls, and forensic limits.
Read guideOct 20, 2026
A 24-man crossover found caffeine sped task responses only at rest among moderate consumers; cycling sped responses but increased errors. No blood caffeine or driving test.
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