Drug interactions
Difenoxin + Quetiapine
Severity: Moderate
Difenoxin and Quetiapine: 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 can cause drowsiness; with quetiapine sedation may be additive. Respiratory depression is possible at higher doses or in vulnerable patients.
What this interaction means in plain words
Difenoxin and Quetiapine 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; Quetiapine belongs to Central Nervous System.
Why it happens
Additive CNS depression via opioid receptor agonism and quetiapine's sedative receptor antagonism.
What to do
Use the lowest effective doses and monitor for sedation. Counsel against driving and alcohol use.
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 Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Other interactions of Difenoxin
Frequently asked questions
Can I take Difenoxin with Quetiapine?
MediHelp rates the interaction as moderate. Difenoxin and Quetiapine 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 can cause drowsiness; with quetiapine sedation may be additive. Respiratory depression is possible at higher doses or in vulnerable patients.
How serious is the interaction between Difenoxin and Quetiapine?
MediHelp rates it moderate, 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 for sedation. Counsel against driving and alcohol use.
What other medicines interact with Quetiapine?
MediHelp also lists interactions of Quetiapine with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Quetiapine page.
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