Haloperidol is an antipsychotic. It works by decreasing excitement in the brain as a dopamine antagonist. Haloperidol also is used to control motor and verbal tics in adults and children who have Tourette syndrome. In addition, haloperidol is used to treat severe behavioral problems, such as explosive, aggressive behavior or hyperactivity in children who cannot be treated with psychotherapy or other medications. Some evidence suggests haloperidol may be considered in the management of chemotherapy-induced nausea and vomiting (CINV).