The Effects of Psychotropic Drugs upon Driving-Related Skills

Abstract

The use of psychotropic drugs by road users is considered to be on the increase although little accurate epidemiological data are available. To determine the effects of such drugs upon driving skills, reliance must be placed upon laboratory investigations. This paper reviews the results of studies of the effects of barbiturate and non-barbiturate hypnotics, tranquillizers, and antidepressants upon sensory functions and perceptual skills, cognitive skills, and motor skills. The relationship between such skills and actual driving performance is discussed and some possible mechanisms whereby psychotropic drugs may contribute to the causation of accidents are described. In view of the wide variety of drugs, dose levels and test situations used, few definite conclusions may be drawn regarding the effects of psychotropic drugs upon driving-related skills.