Drug interactions
Difenoxin + Fluphenazine
Severity: Moderate
Difenoxin and Fluphenazine: moderate 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
Difenoxin is an opioid antidiarrheal metabolite of diphenoxylate and may add to fluphenazine sedation. Together they may cause drowsiness and, at high doses, respiratory depression.
What this interaction means in plain words
Difenoxin and Fluphenazine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Difenoxin belongs to Gastrointestinal Tract; Fluphenazine belongs to Central Nervous System.
Why it happens
Additive CNS depression.
What to do
Monitor for sedation and avoid exceeding recommended doses. Counsel against driving if drowsy.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Other interactions of Difenoxin
Frequently asked questions
Can I take Difenoxin with Fluphenazine?
MediHelp rates the interaction as moderate. Difenoxin and Fluphenazine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Difenoxin is an opioid antidiarrheal metabolite of diphenoxylate and may add to fluphenazine sedation. Together they may cause drowsiness and, at high doses, respiratory depression.
How serious is the interaction between Difenoxin and Fluphenazine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for sedation and avoid exceeding recommended doses. Counsel against driving if drowsy.
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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