Drug interactions
Diazepam + Meperidine
Severity: Major
Diazepam and Meperidine: major interaction.
Last updated Sources: US FDA label
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Opioids combined with benzodiazepines can cause profound sedation, respiratory depression, coma, and death. This combination carries regulatory boxed warnings.
What this interaction means in plain words
Diazepam and Meperidine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Diazepam belongs to Musculoskeletal; Meperidine belongs to Musculoskeletal.
Why it happens
Additive CNS and respiratory depression via opioid and GABA-A receptor effects.
What to do
Avoid concurrent use when possible; otherwise use the lowest effective doses for the shortest duration and monitor sedation and respiration.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Meperidine
- Alvimopan + Meperidine Contraindicated
- Isocarboxazid + Meperidine Contraindicated
- Meperidine + Methylene blue Contraindicated
- Meperidine + Olanzapine / samidorphan Contraindicated
- Meperidine + Phenelzine Contraindicated
- Meperidine + Procarbazine Contraindicated
Other interactions of Diazepam
Frequently asked questions
Can I take Diazepam with Meperidine?
MediHelp rates the interaction as major. Diazepam and Meperidine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Opioids combined with benzodiazepines can cause profound sedation, respiratory depression, coma, and death. This combination carries regulatory boxed warnings.
How serious is the interaction between Diazepam and Meperidine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use when possible; otherwise use the lowest effective doses for the shortest duration and monitor sedation and respiration.
What other medicines interact with Meperidine?
MediHelp also lists interactions of Meperidine with, for example, Alvimopan, Isocarboxazid, Methylene blue. The full list is on the Meperidine page.
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