Which characteristic indicates the possible influence of depressants?

The characteristic indicating the possible influence of depressants is slowed pupil responses. Depressants, such as alcohol or benzodiazepines, typically work by reducing activity in the central nervous system. This reduction affects various physiological responses, including pupil size. While stimulants can cause increased heart rates and heightened sensory perceptions, depressants do the opposite by calming these functions. Slowed pupil responses are a clear indication of the sedative effects of depressants, highlighting how they can lead to decreased responsiveness and lethargy in the body.