Drug interactions
Belladonna and opium + Trospium
Severity: Moderate
Belladonna and opium and Trospium: 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
Belladonna and opium suppositories supply antimuscarinic and opioid effects. With trospium they can worsen urinary retention, constipation and anticholinergic symptoms, and the opioid component adds further constipation and urinary retention.
What this interaction means in plain words
Belladonna and opium and Trospium 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 antimuscarinic effects, with opioid contributions to reduced bowel and bladder motility.
What to do
Monitor for urinary retention, constipation and anticholinergic effects. Use the lowest effective doses and avoid prolonged combined 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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Belladonna and opium and Trospium, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Trospium
- Clozapine + Trospium Major
- Pramlintide + Trospium Major
- Thioridazine + Trospium Major
- Trihexyphenidyl + Trospium Major
- Aclidinium + Trospium Moderate
- Amantadine + Trospium Moderate
Frequently asked questions
Can I take Belladonna and opium with Trospium?
MediHelp rates the interaction as moderate. Belladonna and opium and Trospium 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. Belladonna and opium suppositories supply antimuscarinic and opioid effects. With trospium they can worsen urinary retention, constipation and anticholinergic symptoms, and the opioid component adds further constipation and urinary retention.
How serious is the interaction between Belladonna and opium and Trospium?
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 urinary retention, constipation and anticholinergic effects. Use the lowest effective doses and avoid prolonged combined use.
What other medicines interact with Trospium?
MediHelp also lists interactions of Trospium with, for example, Clozapine, Pramlintide, Thioridazine. The full list is on the Trospium page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
