Blood and/or urine from fatally injured drivers in Washington State we
re collected and tested for the presence of drugs and alcohol. Drug an
d/or alcohol use was a factor in 52% of all fatalities. Among single v
ehicle accidents, alcohol use was a factor in 61% of cases versus 30%
for multiple vehicle accidents. Drugs most commonly encountered were m
arijuana (11%), cocaine (3%), amphetamines (2%), together with a varie
ty of depressant prescription medications. Trends noted included an as
sociation of depressant use with higher blood alcohol levels, while ma
rijuana use was associated with lower blood alcohol levels. Marijuana
use was noted to be most prominent in the 15-30 year age group, stimul
ant use in the 21-40 year old group, and prescription depressant use w
as more prevelant in the 45+ age group. Drug use demographics in this
population are consistent with those noted in other jurisdictions.