Recurring concern
Inadequate controls for combined sedative medication toxicity
First reported 8 Aug 2018•Latest report 29 Dec 2025
What this concern includes
Includes failures of controls specifically intended to prevent, detect or respond to toxicity from combining prescribed and non-prescribed sedative medicines, multiple sedating medicines, or sedative medicines with excess alcohol, including interaction guidance, patient warnings, prescribing and quantity safeguards, monitoring, follow-up and escalation.
Not included
- Excludes general medication prescribing, administration, supply or monitoring failures where combined sedative toxicity is not the identified unsafe condition.
- Excludes access to dangerous or prescription-only medicines where the concern is unauthorised supply or excessive quantity rather than toxicity from combining sedative substances.
- Excludes single-medicine adverse effects and non-sedative medication interactions unless the assertion explicitly concerns the same combined-sedative toxicity hazard.
- Excludes treatment of established overdose or intoxication after the combined-sedative toxicity risk was reliably recognised and escalated.
- Reports
- 5
- Individual concerns
- 7
- Date range
- 2018–2025
- Stated actions
- 16
Distinct published reports
A report can raise multiple concerns
First to latest report issue date
Described in published responses
Reports over time
Reports over time
Reports about this concern issued each year.
* 2026 is projected from reports observed to 7 Sep 2026.
Most frequent recipients
Most frequent recipients
Reports about this concern sent to each recipient.
Concerns and responses across reports
Only concerns grouped under this recurring concern are included. Select any concern, action or position to view the source wording.
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Concerns raised2
Potential for over-sedation and death from combined sedative medications
Failure to provide and implement specific warnings about the risks of over-sedation from additional non-prescribed medication
Responses linked to these concernsEach statement is shown once, even when linked to more than one concern.
Actions described in response An action is something a respondent says it has done, is doing, or plans to do in response to the concern raised.3
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Action
Remind secure-environment prescribers to discuss medication purposes, risks, interactions, follow-up, and document contemporaneous consultation advice.
Stated by Northamptonshire Healthcare NHS Foundation Trust -
Action
Remind prescribing clinicians to assess and manage cumulative sedative burden, recognise oversedation, repeat unexpected observations, document findings and escalation decisions, and escalate concerns proactively.
Stated by Northamptonshire Healthcare NHS Foundation Trust -
Action
Introduce and routinely provide patients with a harm-minimisation leaflet covering polypharmacy, illicit substances, substance use alone, reduced tolerance, and medication initiation or titration risks.
Stated by Northamptonshire Healthcare NHS Foundation Trust
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Concerns raised2
Failure of clozapine packaging and leaflets to warn that combined use with alcohol may cause death
Lack of guidance on the risk of death from combined clozapine and alcohol use
Responses linked to these concernsEach statement is shown once, even when linked to more than one concern.
Actions described in response An action is something a respondent says it has done, is doing, or plans to do in response to the concern raised.5
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Action
Conduct a further assessment of clozapine product information on drug-drug interactions and consider improvements for healthcare professionals, patients, families and carers.
Stated by Medicines and Healthcare products Regulatory Agency -
Action
Work with the British National Formulary as the clozapine assessment progresses.
Stated by Medicines and Healthcare products Regulatory Agency -
Action
Review and revise pharmacodynamic interaction wording on sedative and CNS-depressant risks in BNF messages and tables.
Stated by BNF Publications
-
Action
Add pharmacodynamic interaction tables to online BNF and BNFC versions.
Stated by BNF Publications -
Action
Share the coroner’s report with NICE for consideration of its findings in published guidance.
Stated by Department of Health and Social Care
Respondent positions A position is what a respondent says about the concern when they do not describe a specific action.2
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Position
MHRA is responsible for assessing and potentially improving clozapine product information about drug interactions and associated safety risks.
Stated by Department of Health and Social Care
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Position
NICE is responsible for considering whether the report’s findings should affect published guidance on clozapine and alcohol risks.
Stated by Department of Health and Social Care
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Concerns raised1
Severe risk of cumulative and synergistic central nervous system depression from gabapentinoid and opioid polypharmacy
This report raised 1 other concern. They are not shown here because they do not form part of this recurring concern.
Responses linked to these concernsEach statement is shown once, even when linked to more than one concern.
Actions described in response An action is something a respondent says it has done, is doing, or plans to do in response to the concern raised.8
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Action
Audit high-dose opioid patients, arrange reviews, and consider dose reduction where appropriate.
Stated by Hilltops Medical Centre -
Action
Identify and review patients prescribed opioids with gabapentinoids and benzodiazepines or Z-drugs.
Stated by Hilltops Medical Centre -
Action
Maintain three-monthly medication reviews using recall systems, preferably face to face and with a named clinician.
Stated by Hilltops Medical Centre
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Action
Use the Arden’s Opioid Initiation and Monitoring template during medication reviews.
Stated by Hilltops Medical Centre -
Action
Operate a national programme to reduce harm from high-dose opioids prescribed for non-cancer pain.
Stated by NHS England -
Action
Support Integrated Care Systems to develop, implement, adapt and share effective improvements in chronic pain and opioid prescribing care.
Stated by NHS England -
Action
Develop national resources supporting consistent repeat-prescribing processes and structured medication reviews for patients at risk from multiple medicines.
Stated by NHS England -
Action
Publish a national framework to help systems improve personalised care for adults prescribed dependence- or withdrawal-associated medicines.
Stated by NHS England
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Concerns raised1
Lack of written advice on the risks of combining multiple opioids
This report raised 3 other concerns. They are not shown here because they do not form part of this recurring concern.
Responses linked to these concernsEach statement is shown once, even when linked to more than one concern.
No linked response statementsNo respondent-stated action or position is linked to these concerns in the published data.
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Concerns raised1
Potential for serious harm or death from combined drug toxicity associated with polypharmacy
This report raised 1 other concern. They are not shown here because they do not form part of this recurring concern.
Responses linked to these concernsEach statement is shown once, even when linked to more than one concern.
No linked response statementsNo respondent-stated action or position is linked to these concerns in the published data.
Data last updated 7 September 2026