Final answer:
The most common hallucinations experienced by individuals with schizophrenia like Nick are auditory hallucinations. Treatment for schizophrenia involves antipsychotic medications that manage the symptoms by blocking dopamine receptors.
Step-by-step explanation:
Nick, who has schizophrenia, is most likely experiencing auditory hallucinations, which are the most common type of hallucinations in individuals with this condition. Schizophrenia affects about one percent of the population in the United States and is characterized by various symptoms, including difficulties with reality perception, emotional regulation, and social interaction. The disorder is associated with the malfunction of dopaminergic neurons and can involve glutamate signaling issues. Antipsychotic medications are the standard treatment, aiming to block dopamine receptors and manage symptoms, but they are not a cure.