List of products in the National Drug Code with proprietary name . Deutetrabenazine is used to decrease involuntary movements (chorea) caused by Huntington's disease. It is also used to treat involuntary movements of the face, tongue, or other body parts (tardive dyskinesia). However, it is not a cure for the Huntington's disease or tardive dyskinesia. Reducing involuntary movements will help you take part in more of your normal daily activities. This medication is thought to work by decreasing the amount of certain natural substances in the brain that affect how your nerves and muscles work (monoamines such as dopamine, serotonin, and norepinephrine).