An Australian study associated prescription monitoring with changes in multiple-prescriber rates for monitored medicines, including benzodiazepines, without determining whether each episode represented misuse.
Picco and colleagues studied electronic records from 562 general practices in three Victorian healthcare networks. Patients had prescriptions for monitored medicines, such as opioids and benzodiazepines, or non-monitored psychotropics during 2017–2023. The analysis defined multiple prescribing as receiving relevant prescriptions from at least four prescribers during a rolling 90-day period.
That definition describes a record pattern. It does not itself establish deception, diversion, simultaneous consumption, or a clinically inappropriate prescription. Multiple clinicians can be involved for different reasons, and the investigators could not distinguish every appropriate episode from inappropriate care.
The controlled interrupted time-series analysis compared monitored medicines with non-monitored medicines. After voluntary implementation in April 2019, the authors reported a differential step reduction of 3.55 patients per 1,000 and a downward differential monthly trend of 0.29 per 1,000. The confidence intervals excluded zero.
Mandatory implementation in April 2020 did not produce a significant additional differential step change. The differential trend then increased by 0.21 per 1,000 per month. These results do not support describing both policy stages as having identical effects. The later period also overlapped the COVID-19 pandemic, a relevant context for interpretation.
The headline estimates concern the monitored-medicine group. They are not a benzodiazepine-only effect estimate. The comparison group and the adjustment for prior trends strengthen the policy analysis, but they do not turn it into random assignment of patients or practices.
The networks did not capture every outside prescriber or specialist. The authors acknowledged that some multiple-prescriber episodes could therefore be missed. The data also could not resolve the clinical appropriateness of each episode.
The study supports reviewing continuity of prescribing and the chronology behind a monitoring alert. The next questions are which clinicians prescribed which medicines, whether prescriptions overlapped, what was dispensed, and whether care was coordinated. A count of prescribers is a prompt to examine those facts. It is not a substitute for evidence of ingestion, impairment, or intent in an individual case.
Original analysis of the supplied journal article, identified as PMC13238316.