Drug interactions
Diphenoxylate-atropine + Methscopolamine
Severity: Moderate
Diphenoxylate-atropine and Methscopolamine: 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
Both products have antimuscarinic activity, so combined use increases anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Older adults and patients with obstructive conditions are most at risk.
What this interaction means in plain words
Diphenoxylate-atropine and Methscopolamine 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 antagonism at muscarinic receptors.
What to do
Monitor for anticholinergic toxicity, including urinary retention and reduced bowel motility, and reduce doses if symptoms appear. Avoid in patients with glaucoma or intestinal obstruction.
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 Methscopolamine?
MediHelp rates the interaction as moderate. Diphenoxylate-atropine and Methscopolamine 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. Both products have antimuscarinic activity, so combined use increases anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Older adults and patients with obstructive conditions are most at risk.
How serious is the interaction between Diphenoxylate-atropine and Methscopolamine?
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 anticholinergic toxicity, including urinary retention and reduced bowel motility, and reduce doses if symptoms appear. Avoid in patients with glaucoma or intestinal obstruction.
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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