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3,4-Methylenedioxymethamphetamine (MDMA, ecstasy) and driving impairment.

B K Logan¹, F J Couper

¹Washington State Toxicology Laboratory, Bureau of Forensic Laboratory Services, Washington State Patrol, Seattle 98134, USA. blogan@wsp.wa.gov

Journal of Forensic Sciences

|November 21, 2001

Summary

3,4-Methylenedioxymethamphetamine (MDMA) use significantly impairs driving abilities, affecting psychomotor skills. Even after last use, these impairments can persist, making MDMA-impaired driving unsafe.

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Area of Science:

Neuroscience
Forensic Science
Public Health

Background:

3,4-Methylenedioxymethamphetamine (MDMA) is a recreational drug with stimulant and empathogenic properties.
Increasing MDMA abuse raises concerns about its impact on public safety, particularly driving.
MDMA's effects on psychomotor skills are critical to understand for impaired driving assessment.

Purpose of the Study:

To review the literature on MDMA's psychomotor effects relevant to driving.
To examine the dose-response relationship and blood concentrations of MDMA.
To analyze studies and case reports on MDMA's specific effects on driving performance.

Main Methods:

Literature review of psychomotor effects and driving impairment.
Analysis of dose-blood concentration relationships.
Examination of driving simulator studies, anecdotal reports, and case series.
Detailed reporting of eighteen cases of apparent MDMA-impaired driving.

Main Results:

MDMA impairs psychomotor skills essential for safe driving.
Observed effects include muscle twitching, tremors, dilated pupils, and poor coordination.
Field sobriety tests were poorly performed by MDMA-affected drivers.
No clear correlation found between MDMA blood concentration and observed impairment.

Conclusions:

MDMA use is incompatible with safe driving.
Impairment of driving-related functions can persist long after MDMA use.
MDMA poses a significant risk to road safety due to its effects on drivers.