Which of the following is an effect of PCP?

The presence of hallucinations is a well-documented effect of PCP (phencyclidine), which is a powerful dissociative drug. When individuals use PCP, they can experience profound alterations in perception and reality, often leading to visual and auditory hallucinations. This characteristic is one of the main reasons PCP is classified as a hallucinogen, as it significantly affects an individual’s thoughts, senses, and emotions, resulting in experiences that are not based in reality.

This is contrasted with other options present in the question. While a flushed face can occur as a side effect of various substances, it is not specifically associated with PCP. Individuals under the influence of PCP may become uncommunicative, but this behavior is more reflective of the dissociative aspect of the drug rather than a defining characteristic like hallucinations. Constricted pupils are generally linked to opioids rather than PCP, as PCP often leads to dilated pupils instead. Overall, the presence of hallucinations is a prominent and defining effect of PCP, thereby making it the correct answer in this context.