Drug interactions
Fentanyl intranasal + Haloperidol
Severity: Major
Fentanyl intranasal and Haloperidol: 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 an antipsychotic increases sedation, hypotension and respiratory depression. Haloperidol may also modestly raise fentanyl exposure via CYP3A4 inhibition.
What this interaction means in plain words
Fentanyl intranasal and Haloperidol 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.
Why it happens
Additive CNS and respiratory depression, with possible CYP3A4 inhibition by haloperidol increasing fentanyl levels.
What to do
Use the lowest effective doses and monitor respiratory rate, sedation and blood pressure. Reduce the dose of one or both drugs if sedation develops.
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 Haloperidol
- Dofetilide + Haloperidol Contraindicated
- Dronedarone + Haloperidol Contraindicated
- Haloperidol + Ibutilide Contraindicated
- Haloperidol + Levoketoconazole Contraindicated
- Haloperidol + Panobinostat Contraindicated
- Haloperidol + Pimozide Contraindicated
Frequently asked questions
Can I take Fentanyl intranasal with Haloperidol?
MediHelp rates the interaction as major. Fentanyl intranasal and Haloperidol 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 an antipsychotic increases sedation, hypotension and respiratory depression. Haloperidol may also modestly raise fentanyl exposure via CYP3A4 inhibition.
How serious is the interaction between Fentanyl intranasal and Haloperidol?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective doses and monitor respiratory rate, sedation and blood pressure. Reduce the dose of one or both drugs if sedation develops.
What other medicines interact with Haloperidol?
MediHelp also lists interactions of Haloperidol with, for example, Dofetilide, Dronedarone, Ibutilide. The full list is on the Haloperidol page.
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