Which is a common acute effect of PCP?

Visual illusions are a common acute effect of PCP (phencyclidine), which is a dissociative anesthetic. When individuals consume PCP, it can significantly alter their sensory perceptions, leading to experiences such as distorted visual input, where they might see things that aren’t there or where objects appear to be different from how they actually are. This distortion can be quite vivid and can significantly affect the individual's understanding of their environment.

PCP primarily affects the brain's glutamate receptors, and the resultant alterations in perception can lead to confusion and disorientation as well as visual distortions. Such effects are part of the dissociative experience associated with the drug, making visual illusions a hallmark symptom during its acute phase of use.