Research Study

A Phase III, Multicentre, Randomized, Parallel-group, Double-blind, Placebo Controlled Study to Evaluate the Efficacy and Safety of Ocrelizumab in Adults With Primary Progressive Multiple Sclerosis
Principal Investigator 
Anthony Traboulsee


Body Locations and Systems 
Multiple Sclerosis 
Closed for Recruitment
Study Start/End 
Feb 1, 2012 to Dec 31, 2020
UBC Hospital
Erin Gallinger, Research Coordinator
Purpose of Study 

This randomized, parallel group, double-blind, placebo controlled study will evaluate the efficacy and safety of ocrelizumab in participants with primary progressive multiple sclerosis. Eligible participants will be randomized 2 : 1 to receive either ocrelizumab or placebo. The blinded treatment period will be at least 120 weeks, followed by an Open Label Extension (OLE) treatment for participants in both groups who in the opinion of the investigator could benefit from further or newly initiated ocrelizumab treatment. Unless terminated early, all participants will continue their treatment with open-label ocrelizumab until the last participant who entered the OLE phase reaches 4 years of open-label ocrelizumab treatment.


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Study Coordinators and Research Nurses cannot give medical advice over the phone. Telephone numbers and email addresses are provided for obtaining additional information on specific clinical research trials only. If you have specific questions which require clinical expertise, please call your primary care physician.