Which treatment class is used to manage chorea in Huntington disease?

Which treatment class is used to manage chorea in Huntington disease?

• A. Levodopa
• B. Antidepressants
• C. Antidopaminergic agents (typical or atypical antipsychotics, tetrabenazine)
• D. Benzodiazepines

Answer: (C)

Chorea in Huntington disease is best managed by reducing dopaminergic activity in the basal ganglia. The involuntary, writhing movements arise from imbalanced signaling in the motor pathways, and lowering dopamine transmission helps dampen those jerky motions. Antidopaminergic agents do this by either blocking dopamine receptors or depleting dopamine stores. Typical and atypical antipsychotics (which block D2 receptors) reduce chorea and can also help with accompanying behavioral or psychiatric symptoms. Dopamine-depleting medications like tetrabenazine and related VMAT2 inhibitors decrease the amount of dopamine released into the synapse, providing strong relief of chorea for many patients. Levodopa would raise dopamine levels and tend to worsen chorea. Antidepressants address mood or other non-motor symptoms but don’t directly control chorea. Benzodiazepines may help with anxiety or sleep but are not effective primary treatments for the choreiform movements themselves. So, targeting dopamine activity with antidopaminergic agents is the mechanism behind the most effective approach to managing Huntington chorea.

Chorea in Huntington disease is best managed by reducing dopaminergic activity in the basal ganglia. The involuntary, writhing movements arise from imbalanced signaling in the motor pathways, and lowering dopamine transmission helps dampen those jerky motions.

Antidopaminergic agents do this by either blocking dopamine receptors or depleting dopamine stores. Typical and atypical antipsychotics (which block D2 receptors) reduce chorea and can also help with accompanying behavioral or psychiatric symptoms. Dopamine-depleting medications like tetrabenazine and related VMAT2 inhibitors decrease the amount of dopamine released into the synapse, providing strong relief of chorea for many patients.

Levodopa would raise dopamine levels and tend to worsen chorea. Antidepressants address mood or other non-motor symptoms but don’t directly control chorea. Benzodiazepines may help with anxiety or sleep but are not effective primary treatments for the choreiform movements themselves.

So, targeting dopamine activity with antidopaminergic agents is the mechanism behind the most effective approach to managing Huntington chorea.