Drug interactions
Tiotropium + Umeclidinium bromide
Severity: Major
Tiotropium and Umeclidinium bromide: major 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 are long-acting inhaled muscarinic antagonists, so using them together duplicates therapy without clear added benefit and increases anticholinergic adverse effects. These include dry mouth, urinary retention, glaucoma worsening and tachycardia.
What this interaction means in plain words
Tiotropium and Umeclidinium bromide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Duplicate muscarinic receptor antagonism with additive systemic anticholinergic exposure.
What to do
Avoid concurrent use and choose a single long-acting antimuscarinic. If one is replaced, stop the first before starting the second.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Tiotropium
Frequently asked questions
Can I take Tiotropium with Umeclidinium bromide?
MediHelp rates the interaction as major. Tiotropium and Umeclidinium bromide can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both are long-acting inhaled muscarinic antagonists, so using them together duplicates therapy without clear added benefit and increases anticholinergic adverse effects. These include dry mouth, urinary retention, glaucoma worsening and tachycardia.
How serious is the interaction between Tiotropium and Umeclidinium bromide?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid concurrent use and choose a single long-acting antimuscarinic. If one is replaced, stop the first before starting the second.
What other medicines interact with Tiotropium?
MediHelp also lists interactions of Tiotropium with, for example, Glycopyrrolate inhaled, Indacaterol-glycopyrronium, Revefenacin. The full list is on the Tiotropium page.
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