Drug interactions
Fluphenazine + Midazolam intranasal
Severity: Major
Fluphenazine and Midazolam intranasal: major interaction.
Last updated Sources: Health Canada product monograph
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
Midazolam with other CNS depressants such as fluphenazine can cause profound sedation, hypoventilation and apnea. Respiratory compromise is the main concern.
What this interaction means in plain words
Fluphenazine and Midazolam intranasal 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 via GABA-A potentiation and phenothiazine sedation.
What to do
Use only where continuous monitoring of respiration and oxygen saturation is possible. Use the lowest effective midazolam dose and have resuscitation equipment 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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References
Other interactions of Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Frequently asked questions
Can I take Fluphenazine with Midazolam intranasal?
MediHelp rates the interaction as major. Fluphenazine and Midazolam intranasal 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. Midazolam with other CNS depressants such as fluphenazine can cause profound sedation, hypoventilation and apnea. Respiratory compromise is the main concern.
How serious is the interaction between Fluphenazine and Midazolam intranasal?
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 only where continuous monitoring of respiration and oxygen saturation is possible. Use the lowest effective midazolam dose and have resuscitation equipment available.
What other medicines interact with Fluphenazine?
MediHelp also lists interactions of Fluphenazine with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Fluphenazine page.
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