Mild to moderate HD patients receive medicine treatment with different doses of Deutetrabenazine(Austedo), Risperidone, Zoloft+Idebenone, according to their symptoms. The mode of administration is oral. Capsules will be swallowed whole with water. Zoloft should be taken 50mg once in the morning and Risperidone 1mg once at night. Deutetrabenazine(Austedo) should be taken 6mg once a day, or increase dose according to AUSTEDO® tablets Prescribing Information. Idebenone should be taken 30mg three times a day. Study drug can be taken irrespective of meals. Duration:5 years.

Mild to moderate HD patients receive medicine treatment with different doses of Haloperidol, Risperidone, Zoloft+Idebenone, according to their symptoms. The mode of administration is oral. Capsules will be swallowed whole with water. Haloperidol should be taken 0.5mg~1mg three times a day. The administration of Zoloft, Risperidone and Idebenone are same as group 1. Study drug can be taken irrespective of meals. Duration:5 years.

Haloperidol take 0.5mg~2mg three time a day.

The Unified Huntington's Disease Rating Scale consist of four subscales, including motor(0-124), MMSE (0-30), psychiatric (0-176), and functional domains(1-13). Four subscale scores are summed to compute a total score. Higher motor and psychiatric scores represent worse outcomes but higher MMSE score and functional scores indicate good outcome.

Brain MRI is used to assess the atrophy of caudate nucleus and cortex in HD patients