Abstract
Drugs affecting driving ability (DADAs) directly or by indicating at-risk diseases are classified in a 4-level standardized classification associated with a graded pictogram. A study in the French police database of crashes and in the national health care database showed an increased risk of being responsible in drivers exposed to level 2 or level 3 drugs but did not include information on sleepiness, the use of illicit drugs, or other occupational factors. The objective was to describe the factors associated with being responsible for a serious road crash and patient-reported use of labeled medicines. (Author/publisher)