List of products in the National Drug Code with proprietary name . This medication is used to reduce uncontrolled movements (motor tics) or outbursts of words/sounds (vocal tics) caused by Tourette syndrome. Pimozide is a medication that works by decreasing the activity of a natural substance (dopamine) in the brain. Pimozide should not be used for mild symptoms. It should only be used if symptoms cause severe problems in everyday life and other medicines or treatments have not been effective.