Health Canada's use of expedited review pathways and therapeutic innovation, 1995-2016: cross-sectional analysis.

OBJECTIVES: This study examines the use of expedited approval pathways by Health Canada over the period 1995 to 2016 inclusive and the relationship between the use of these pathways and the therapeutic gain offered by new products.

DESIGN: Cross-sectional study.

DATA SOURCES: Therapeutic Products Directorate, Biologics and Genetic Therapies Directorate, Notice of Compliance database, Notice of Compliance with conditions web site, Patented Medicine Prices Review Board, La revue Prescrire, WHO Anatomical Therapeutic Chemical classification system.

PRIMARY AND SECONDARY OUTCOMES: Percent of new drugs evaluated by Health Canada that went through an expedited pathway between 1995 and 2016 inclusive. Kappa values comparing the review status with assessments of therapeutic value for individual drugs.

RESULTS: Of 623 drugs approved by Health Canada between 1995 and 2016, 438 (70.3%) drugs went through the standard pathway and 185 (29.7%) an expedited pathway. Therapeutic evaluations were available for 509 drugs. Health Canada used an expedited approval pathway for 159 of the 509 drugs, whereas only 55 were judged to be therapeutically innovative. Forty-two of the 55 therapeutically innovative drugs received an expedited review and 13 received a standard review. The Kappa value for the entire period for all 509 drugs was 0.276 (95% CI 0.194 to 0.359) indicating 'fair' agreement between Health Canada's use of expedited pathways and independent evaluations of therapeutic innovation.

CONCLUSION: Health Canada's use of expedited approvals was stable over the entire time period. It was unable to reliably predict which drugs will offer major therapeutic gains. The findings in this study should provoke a discussion about whether Health Canada should continue to use these pathways and if so how their use can be improved.