Which of the following treatments is commonly used for Tourette syndrome?

Dopamine agonists and antagonists are the treatments commonly used for Tourette syndrome primarily because the condition is characterized by motor and vocal tics, which are thought to be linked to dysregulation of dopaminergic pathways in the brain. Medications that affect dopamine levels can help in reducing the frequency and severity of these tics. Neuroleptics, also known as antipsychotics, are often used as a first-line treatment since they specifically target the excessive dopaminergic activity that contributes to the development of tics.

In contrast, while antidepressants, beta-blockers, and antihistamines may have some utility for associated symptoms or comorbid conditions such as anxiety or ADHD, they are not considered first-line treatments for the core symptoms of Tourette syndrome. Antidepressants may help with coexisting mood disorders, beta-blockers can be effective for managing anxiety and performance-related tics, and antihistamines may provide mild sedation but do not address the underlying dopaminergic dysfunction associated with Tourette's. Therefore, dopamine agonists and antagonists play a crucial role in the management of this disorder.