Drug interactions
Rivastigmine + Trospium
Severity: Moderate
Rivastigmine 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
Rivastigmine raises acetylcholine levels while trospium blocks muscarinic receptors, so the two work against each other. Trospium may lessen the cognitive benefit of rivastigmine, and rivastigmine may reduce the efficacy of trospium in overactive bladder.
What this interaction means in plain words
Rivastigmine 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.
Rivastigmine belongs to Central Nervous System; Trospium belongs to Genitourinary.
Why it happens
Pharmacodynamic antagonism between a cholinesterase inhibitor and a muscarinic antagonist.
What to do
Monitor cognition and urinary symptoms. Where possible, avoid the combination or choose a non-antimuscarinic option for bladder symptoms.
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 Trospium
- Clozapine + Trospium Major
- Pramlintide + Trospium Major
- Thioridazine + Trospium Major
- Trihexyphenidyl + Trospium Major
- Aclidinium + Trospium Moderate
- Amantadine + Trospium Moderate
Other interactions of Rivastigmine
Frequently asked questions
Can I take Rivastigmine with Trospium?
MediHelp rates the interaction as moderate. Rivastigmine 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. Rivastigmine raises acetylcholine levels while trospium blocks muscarinic receptors, so the two work against each other. Trospium may lessen the cognitive benefit of rivastigmine, and rivastigmine may reduce the efficacy of trospium in overactive bladder.
How serious is the interaction between Rivastigmine 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 cognition and urinary symptoms. Where possible, avoid the combination or choose a non-antimuscarinic option for bladder symptoms.
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.
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