What can be a sign of dissociative anesthetic overdose?

A sign of dissociative anesthetic overdose is deep coma. Dissociative anesthetics, such as PCP (phencyclidine) and ketamine, can lead to severe impairment of consciousness, which may manifest as deep coma in extreme cases. Overdose can disrupt normal brain function, leading to a significant decrease in awareness and responsiveness. This state indicates critical medical concerns requiring immediate attention since it suggests the central nervous system is severely affected.

The other options do not accurately represent effects associated with dissociative anesthetic overdose. Extended happiness may occur with lower doses or in the initial phases of intoxication but does not align with the serious consequences of an overdose. Improved cognitive function is unlikely, as these substances typically impair cognitive abilities rather than enhance them. Increased energy may occur with stimulants but is not characteristic of dissociative anesthetics, where sedation and detachment are more common outcomes, especially in cases of overdose.