What physical expression is commonly seen with depressant use?

The presence of drooped eyelids along with involuntary jerking of the eyes is a notable physical expression associated with the use of depressants. Depressants, such as alcohol or barbiturates, typically act by slowing down the central nervous system, which can lead to a relaxed state and decreased motor functions. This slowing effect can result in observable signs such as drowsiness and droopy eyelids, reflecting the sedative impact these substances have on an individual's physical state. Involuntary eye movements may also occur due to the way these substances affect neurological functions and muscle control, further supporting the identification of this physical expression as characteristic of depressant use.

Other options describe effects that are not typically associated with depressants. For instance, hyperactivity relates more to stimulant substances, which increase energy levels rather than inhibit them. Similarly, perfect coordination and balance would imply an enhancement of motor skills, which is counter to the effects of depressants. Lastly, increased alertness is an effect associated with stimulants, contrasting with the sedative nature of depressants.