Mitigating Polypharmacy Risks: Prioritizing Potentially Inappropriate Prescribing Cascades

Article Impact Level: HIGH
Data Quality: STRONG
Summary of  BMJ https://doi.org/10.1136/bmj-2026-100499
Dr. Paula A Rochon et al.

Points

Sinai Health researchers led a population retrospective cohort study analyzing prescription data across Ontario to evaluate potentially inappropriate prescribing cascades in aging populations.
International panels of twelve medical experts initially identified sixty five cascades before analyzing population health databases to establish a prioritized list of twenty four high risk sequences.
Older adults facing polypharmacy and mature women with multiple chronic conditions exhibited heightened vulnerability to having adverse drug effects misdiagnosed as new medical diagnoses.
Common prescribing cascades included initiating nonsteroidal anti-inflammatory drugs for pain management, which elevated blood pressure and triggered secondary antihypertensive prescriptions rather than pain medication reassessment.
Investigators recommended implementing automated clinical decision support tools and expanding clinical pharmacist integration to identify inappropriate prescribing sequences and advance deprescribing policy initiatives.

Summary

This population-level retrospective cohort study evaluated the prevalence and clinical significance of potentially inappropriate prescribing cascades (PIPCs) among older adults across Ontario, Canada. Led by Dr. Paula Rochon from Sinai Health and the University of Toronto and published in BMJ, the investigation addressed scenarios where medication-induced adverse events are misdiagnosed as new medical conditions, triggering secondary drug prescriptions. The research sought to systematically identify and prioritize PIPCs to mitigate drug-related harm and decrease avoidable healthcare costs at the population level.

Utilizing an expert consensus methodology involving 12 international panelists across internal medicine, geriatric medicine, and clinical pharmacology from six countries (Canada, United States, Belgium, Italy, Israel, and Ireland), the team initially compiled a master list of 65 distinct PIPCs. Researchers then analyzed population-level prescription data from ICES to evaluate each sequence based on initial drug exposure prevalence, secondary drug initiation frequency, and association strength. This rigorous screening successfully narrowed the initial repository down to a prioritized list of 24 highly prevalent, high-risk PIPCs.

The analysis revealed that PIPCs are widespread within the aging population, particularly among mature women who experience higher chronic disease burden and increased polypharmacy exposure. A characteristic example includes nonsteroidal anti-inflammatory drug (NSAID) initiation causing secondary blood pressure elevations that prompt unwarranted antihypertensive prescriptions. The authors conclude that this prioritized list of 24 PIPCs should directly guide clinical deprescribing initiatives, automated point-of-care decision support systems, and multidisciplinary clinical pharmacist integration to optimize geriatric pharmacotherapy.

Link to the article: https://www.bmj.com/content/394/bmj-2026-100499

References

Rochon, P. A., Austin, P. C., Gurwitz, J. H., Wu, W., Matai, L., Zhang, T., Li, Z., Savage, R. D., Gruneir, A., Li, J., O’Mahony, D., Petrovic, M., Cherubini, A., Onder, G., Sternberg, S. A., McCarthy, L. M., Dalton, K., Reppas-Rindlisbacher, C. E., Stall, N. M., … Giannakeas, V. (2026). Exploring high priority potentially inappropriate prescribing cascades in older adults: Population level retrospective cohort study. BMJ, 394, e100499. https://doi.org/10.1136/bmj-2026-100499