This product is indicated for the treatment of chorea in Huntington's disease. Chorea in Huntington's disease is a rare autosomal dominant neurodegenerative disorder affecting the central nervous system (included in the 2018 China's First List of Rare Diseases). Symptoms include involuntary dance-like movements, cognitive impairment and mental disorders. Tetrabenazine is the world's first drug used to treat chorea in Huntington's disease.