A Dutch registry study identified factors associated with new benzodiazepine–opioid dispensing overlap after elective joint replacement.
Among 89,139 hip and 76,710 knee arthroplasty patients without preoperative concurrent use, about 4% and 7%, respectively, had at least seven days of new overlap within ninety postoperative days. Preoperative benzodiazepine dispensing was the strongest associated factor, with adjusted odds ratios above twenty for both procedures.
The outcome was overlapping outpatient dispensing, not respiratory depression, actual simultaneous ingestion or a measured drug interaction. Hospital-administered medications were unavailable, and linked records underrepresented some groups. A large association can partly reflect the practical introduction of postoperative opioids to people already receiving benzodiazepines.
For a prescribing review, distinguish new overlap from new initiation of both medicines. Confirm the administration schedule, remaining supply and reasons for continuation. These findings identify a transition-of-care question but cannot establish that a particular patient took both drugs together or experienced harm because of the overlap.
Source reviewed: Factors Associated With Concurrent Benzodiazepine and Opioid Use Following Total Hip and Knee Arthro (PMC13067209). Forensic applications above are interpretive analysis of the supplied paper.
Related reading: Endometriosis Claims Study Described Opioid Escalation and Sedative Co-Prescribing.