Tetrabenazine is primarily used in the treatment of chorea associated with Huntington's disease, a neurological disorder characterized by involuntary movements. It works by depleting certain neurotransmitters in the brain, particularly dopamine, which helps to reduce the severity of these involuntary movements. Additionally, it is sometimes prescribed for other hyperkinetic movement disorders, such as tardive dyskinesia, to manage symptoms effectively. Tetrabenazine is also explored for its potential in treating Tourette syndrome and other conditions involving excessive motor activity. Its application is carefully monitored due to potential side effects, including sedation and depression, requiring regular assessment by healthcare providers.