What are some common signs and symptoms associated with PCP use?

The presence of red eyes and muscle rigidity is indeed a common symptom associated with the use of PCP (phencyclidine). PCP is a dissociative anesthetic that can produce a variety of psychological and physiological effects. Red eyes are often observed as a direct consequence of the drug's impact on the body, including its effects on blood vessels. Muscle rigidity is another significant symptom that can occur with PCP use, reflecting its influence on the central nervous system and the body’s muscle control.

In contrast, other options present symptoms that are not commonly linked with PCP use. Increased appetite and sleepiness might be associated with substances that have relaxing or sedative effects but do not accurately represent PCP use. Weight gain and hallucinations may occur with other psychoactive substances, yet PCP is more specifically tied to severe alterations in perception and cognition rather than long-term weight changes. Lastly, fatigue and joyfulness are also not typical of PCP effects, as the drug often leads to agitation or distress rather than an uplifting emotional state. Thus, focusing on physical symptoms such as red eyes and muscle rigidity provides a clearer picture of the effects of PCP use.