Drug interactions
Tiotropium-olodaterol + Trospium chloride
Severity: Moderate
Tiotropium-olodaterol and Trospium chloride: 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
Trospium is an oral antimuscarinic, and tiotropium is an inhaled antimuscarinic. Taken together they can add to anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Systemic exposure from inhaled tiotropium is low, so the effect is usually modest.
What this interaction means in plain words
Tiotropium-olodaterol and Trospium chloride 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 blockade of muscarinic receptors (pharmacodynamic).
What to do
Monitor for anticholinergic effects, especially urinary retention, constipation and narrow-angle glaucoma symptoms in older patients. Reduce or stop one agent if symptoms develop.
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 Tiotropium-olodaterol
Frequently asked questions
Can I take Tiotropium-olodaterol with Trospium chloride?
MediHelp rates the interaction as moderate. Tiotropium-olodaterol and Trospium chloride 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. Trospium is an oral antimuscarinic, and tiotropium is an inhaled antimuscarinic. Taken together they can add to anticholinergic effects such as dry mouth, constipation, urinary retention, blurred vision and tachycardia. Systemic exposure from inhaled tiotropium is low, so the effect is usually modest.
How serious is the interaction between Tiotropium-olodaterol and Trospium chloride?
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 effects, especially urinary retention, constipation and narrow-angle glaucoma symptoms in older patients. Reduce or stop one agent if symptoms develop.
What other medicines interact with Tiotropium-olodaterol?
MediHelp also lists interactions of Tiotropium-olodaterol with, for example, Amisulpride, Arformoterol, Arsenic trioxide. The full list is on the Tiotropium-olodaterol page.
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