EVIDENCE LIBRARY
Browse source-supported forensic toxicology guides in this subject area.
Oct 20, 2026
A randomized primary-brain-tumor trial found no significant dexamphetamine fatigue benefit (p=.17), but more psychiatric adverse events (p=.018).
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Original 106-child dextroamphetamine patch study: one-hour math results nonsignificant, two-to-twelve-hour classroom benefit; no measured forensic blood drug.
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In a 30-driver study, current methamphetamine users sped and wove more on a simulator, but blood methamphetamine levels did not predict key measures.
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Rat d-amphetamine increased VO₂max at 2 mg/kg, not running economy; at 32°C only 1 mg/kg extended endurance, while both raised terminal core temperature.
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A 57-man iTBS trial found lower methamphetamine cue-craving ratings and mixed executive-function changes. Its ROC intervals contain reporting errors; no forensic blood drug assay.
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In a pediatric methylphenidate trial, 20 and 40 mg beat placebo on ADHD ratings; 10 and 15 mg did not. Learn why ratings cannot establish blood drug levels or impaired driving.
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In a 15-patient cohort, cocaine remained measurable in scalp hair for some at four months of reported abstinence; learn assay limits and why hair cannot date a use.
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A 96-person fMRI study found real differences in modeled surprise and stop-error adjustment but no significant mean stop-time gap. No forensic blood drug levels.
Read guideOct 20, 2026
A 56-person methamphetamine-recovery trial found significant plasma NfL and serum NSE changes after exercise, but serum S100B was nonsignificant. What the blood assays really establish.
Read guideOct 20, 2026
A 56-person study found Stroop and stop-signal differences during early methamphetamine abstinence, but no significant gambling or balloon risk-task differences.
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