Drug interactions
Fentanyl intranasal + Olanzapine
Severity: Major
Fentanyl intranasal and Olanzapine: 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
Fentanyl is a potent opioid and olanzapine is a sedating antipsychotic. Combined use may cause profound sedation, respiratory depression and hypotension.
What this interaction means in plain words
Fentanyl intranasal and Olanzapine 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.
What to do
Use the lowest effective fentanyl dose and monitor sedation, respiratory rate and blood pressure. Avoid other CNS depressants where possible.
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 Olanzapine
Frequently asked questions
Can I take Fentanyl intranasal with Olanzapine?
MediHelp rates the interaction as major. Fentanyl intranasal and Olanzapine 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 is a potent opioid and olanzapine is a sedating antipsychotic. Combined use may cause profound sedation, respiratory depression and hypotension.
How serious is the interaction between Fentanyl intranasal and Olanzapine?
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 fentanyl dose and monitor sedation, respiratory rate and blood pressure. Avoid other CNS depressants where possible.
What other medicines interact with Olanzapine?
MediHelp also lists interactions of Olanzapine with, for example, Amisulpride, Amoxapine, Apomorphine. The full list is on the Olanzapine page.
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