Abstract
Randomly selected drivers were stopped at times and places of previous fatal crashes for giving breath, urine, blood and lip swab samples for analysis for drugs and medications. About 5% of drivers evidenced one or more of the 41 drugs tested in the blood or at concentrations of 1 ug/ml or more in the urine. Comparisons indicate that users of drugs are about four times as likely to be fatally injured in a vehicular crash as nonusers.