55
Participants
Start Date
August 1, 2015
Primary Completion Date
June 30, 2021
Study Completion Date
June 30, 2021
Tolcapone
COMT Inhibitor
Placebo
A pill that contains no active ingredient
VA Northern California Health Care System, Mather, CA, Sacramento
University of California, Berkeley
OTHER
University of California, San Francisco
OTHER
VA Office of Research and Development
FED