Drug interactions
Fentanyl + Remimazolam
Severity: Major
Fentanyl and Remimazolam: major interaction.
Last updated
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
Combining an opioid with a benzodiazepine sedative can cause profound sedation, respiratory depression, coma and death. Risk is higher with rapid administration and in frail patients.
What this interaction means in plain words
Fentanyl and Remimazolam 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.
Fentanyl belongs to Musculoskeletal; Remimazolam belongs to Central Nervous System.
Why it happens
Additive CNS and respiratory depression via opioid and GABA-A receptor effects.
What to do
Titrate remimazolam carefully with reduced doses and continuously monitor oxygen saturation, respiration and vital signs through recovery. Ensure airway and resuscitation equipment are available.
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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Other interactions of Fentanyl
- Alvimopan + Fentanyl Contraindicated
- Fentanyl + Isocarboxazid Contraindicated
- Fentanyl + Olanzapine / samidorphan Contraindicated
- Fentanyl + Phenelzine Contraindicated
- Fentanyl + Tranylcypromine Contraindicated
- Alfentanil + Fentanyl Major
Other interactions of Remimazolam
Frequently asked questions
Can I take Fentanyl with Remimazolam?
MediHelp rates the interaction as major. Fentanyl and Remimazolam 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. Combining an opioid with a benzodiazepine sedative can cause profound sedation, respiratory depression, coma and death. Risk is higher with rapid administration and in frail patients.
How serious is the interaction between Fentanyl and Remimazolam?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Titrate remimazolam carefully with reduced doses and continuously monitor oxygen saturation, respiration and vital signs through recovery. Ensure airway and resuscitation equipment are available.
What other medicines interact with Fentanyl?
MediHelp also lists interactions of Fentanyl with, for example, Alvimopan, Isocarboxazid, Olanzapine / samidorphan. The full list is on the Fentanyl page.
Full monographs, dosing and an interaction checker in the MediHelp app
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