This invention provides a method of treating a human patient afflicted with Huntington's disease, comprising periodically orally administering to the patient a pharmaceutical composition comprising pridopidine or a pharmaceutically acceptable salt thereof such that greater than 135 mg of pridopidine is administered to the patient per day. This invention further provides a method of treating a human patient afflicted with Huntington's disease, comprising periodically orally administering to the patient a pharmaceutical composition comprising pridopidine hydrochloride such that greater than 90 mg of pridopidine is administered to the patient per day.
