When the French authorities required this graded pictogram, they commissioned the CESIR-U1 study, a study designed to describe the use of labelled medicines by drivers involved in serious road accidents (hospitalization > 24h). This study, conducted in Bordeaux, Limoges and Toulouse, recruited 679 drivers involved in serious road accidents. When the responsibility of the driver is taken into account, it appears that the association of risk factors (alcohol, sleep, ...) and the use of labelled drugs increases this responsibility. Even though labelled medicines seemed slightly more at risk than unlabelled ones, this did not reach significance.