There may be hallucinations and confusion. The person may think there are bugs crawling on his skin. They may pick and scratch at their skin.
Other Psychosis Beyond paranoia, hallucinations, and panic, other signs of crack use can be a myriad of unexplainable and irrational behaviors that may resemble schizophrenia
Psychological effects may include euphoria, excitation, general arousal, dizziness, increased alertness and focus, mental clarity, increased talkativeness, loss of appetite