Drug interactions
Diphenoxylate-atropine + Droperidol
Severity: Moderate
Diphenoxylate-atropine and Droperidol: 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
Droperidol is sedating and prolongs the QT interval, and atropine adds anticholinergic effects and can cause tachycardia. Together they can increase sedation and anticholinergic toxicity, and diphenoxylate adds CNS depression.
What this interaction means in plain words
Diphenoxylate-atropine and Droperidol 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.
Why it happens
Additive CNS depression and anticholinergic effects, with droperidol's dopamine blockade and QT effects adding cardiac risk.
What to do
Monitor sedation, heart rate and ECG when droperidol is given, especially with other QT-prolonging drugs or electrolyte abnormalities. Correct potassium and magnesium first.
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 Diphenoxylate-atropine
- Diphenoxylate-atropine + Isocarboxazid Contraindicated
- Diphenoxylate-atropine + Phenelzine Contraindicated
- Diphenoxylate-atropine + Tranylcypromine Contraindicated
- Alfentanil + Diphenoxylate-atropine Major
- Alvimopan + Diphenoxylate-atropine Major
- Amitriptyline + Diphenoxylate-atropine Major
Frequently asked questions
Can I take Diphenoxylate-atropine with Droperidol?
MediHelp rates the interaction as moderate. Diphenoxylate-atropine and Droperidol 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. Droperidol is sedating and prolongs the QT interval, and atropine adds anticholinergic effects and can cause tachycardia. Together they can increase sedation and anticholinergic toxicity, and diphenoxylate adds CNS depression.
How serious is the interaction between Diphenoxylate-atropine and Droperidol?
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 sedation, heart rate and ECG when droperidol is given, especially with other QT-prolonging drugs or electrolyte abnormalities. Correct potassium and magnesium first.
What other medicines interact with Diphenoxylate-atropine?
MediHelp also lists interactions of Diphenoxylate-atropine with, for example, Isocarboxazid, Phenelzine, Tranylcypromine. The full list is on the Diphenoxylate-atropine page.
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