It will be dependent on the case but based on the factt that there is a high rate of people who become permanently disabled or unfortunately kill themselves approval will be dependent on what treatment you are currently receiving, whether you have been able to work continuously even though suffering from trigeminal neuralgia, etc. If you have a good treatment plan and doctors I would also be concerned about any changes. Canada doesn’t have a national pharmacare plan or dental coverage under Medicare (although not a dental issue many patients end up needing dental care as part of treatment) so whether you already have a job in Canada that has extended healthcare benefits and how hard will it be to transition your care to Canada would also be something you need to consider.