Drug interactions
Diphenoxylate-atropine + Triprolidine
Severity: Moderate
Diphenoxylate-atropine and Triprolidine: 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
Triprolidine is a first-generation sedating antihistamine with anticholinergic activity. With diphenoxylate-atropine it can cause additive drowsiness and antimuscarinic effects such as dry mouth and urinary retention.
What this interaction means in plain words
Diphenoxylate-atropine and Triprolidine 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.
Diphenoxylate-atropine belongs to Gastrointestinal Tract; Triprolidine belongs to Respiratory.
Why it happens
Additive CNS depression and antimuscarinic effects.
What to do
Counsel about drowsiness and avoid driving until response is known. Monitor for constipation and urinary retention, especially in older adults.
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
Other interactions of Triprolidine
Frequently asked questions
Can I take Diphenoxylate-atropine with Triprolidine?
MediHelp rates the interaction as moderate. Diphenoxylate-atropine and Triprolidine 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. Triprolidine is a first-generation sedating antihistamine with anticholinergic activity. With diphenoxylate-atropine it can cause additive drowsiness and antimuscarinic effects such as dry mouth and urinary retention.
How serious is the interaction between Diphenoxylate-atropine and Triprolidine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Counsel about drowsiness and avoid driving until response is known. Monitor for constipation and urinary retention, especially in older adults.
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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