Which of the following is an example of an antipsychotic drug?

Haldol is an example of an antipsychotic drug because it belongs to a class of medications specifically designed to treat disorders such as schizophrenia and acute psychosis. Antipsychotics work primarily by modulating neurotransmitters in the brain, especially dopamine, which can help alleviate symptoms such as delusions and hallucinations that are characteristic of these mental health conditions.

In contrast, Prozac is a selective serotonin reuptake inhibitor (SSRI) primarily used to treat depression and anxiety. Xanax is a benzodiazepine used for anxiety and panic disorders, enhancing the effect of a neurotransmitter called GABA. Tylenol is an analgesic and antipyretic used to relieve pain and reduce fever, and it has no psychiatric applications. These distinctions clarify why Haldol is the only option that fits the criteria for an antipsychotic drug.