Study IDs 24 Common Prescription Cascade Chains — SkimNews
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- Sinai Health researchers published a BMJ study identifying 24 common "prescribing cascades" — medication chains where a drug's side effect triggers an unnecessary follow-up prescription, citing NSAIDs that raise blood pressure and statins among the drugs involved.
- Dr. Paula Rochon, Director of Research at Sinai Health's Weston and O'Born Center for Mature Women's Health, led the population-level analysis using Ontario prescription data from ICES, narrowing 65 candidate cascades flagged by 12 international panelists down to 24 with measurable real-world impact.
- Older adults are the most exposed population because they typically manage multiple chronic conditions and take several drugs at once, making it difficult for clinicians and patients to tell whether a new symptom stems from an existing medication.
- Mature women face elevated risk because women tend to have more chronic conditions, receive more drug therapies, and experience more adverse drug events across their lifetimes than men, the researchers found.
- An international research team — collaborators from the US, Belgium, Italy, Israel, and Ireland — recommends automated clinical decision support systems that flag when a new prescription appears to address a known side effect of an existing drug.
- Greater pharmacist involvement in prescribing decisions could surface cascade patterns that busy physicians miss, giving clinicians a chance to reconsider the original treatment rather than add another medication.
Why it matters: With 24 prescribing cascades now mapped against real-world Ontario prescription data, the study gives clinicians a concrete checklist for medication reviews and gives automated decision-support systems a defined set of patterns to flag at the point of prescribing. Older adults and mature women, identified by the researchers as the most exposed, face avoidable drug burden when these cascades go unrecognized.
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