Drug interactions
Glycopyrronium + OnabotulinumtoxinA
Severity: Moderate
Glycopyrronium and OnabotulinumtoxinA: 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
Botulinum toxin blocks acetylcholine release, and labeling warns that anticholinergic drugs may potentiate its systemic anticholinergic effects. Glycopyrronium could therefore add to dry mouth, blurred vision or generalized weakness after injection.
What this interaction means in plain words
Glycopyrronium and OnabotulinumtoxinA 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.
Glycopyrronium belongs to Respiratory; OnabotulinumtoxinA belongs to Musculoskeletal.
Why it happens
Additive cholinergic blockade: presynaptic inhibition of acetylcholine release by the toxin plus postsynaptic muscarinic antagonism.
What to do
Monitor for excessive weakness, swallowing or breathing difficulty and systemic anticholinergic effects after injection. Use the lowest effective glycopyrronium dose.
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 Glycopyrronium
- Clozapine + Glycopyrronium Major
- Abobotulinumtoxina + Glycopyrronium Moderate
- Aclidinium + Glycopyrronium Moderate
- Amantadine + Glycopyrronium Moderate
- Amitriptyline + Glycopyrronium Moderate
- Amoxapine + Glycopyrronium Moderate
Other interactions of OnabotulinumtoxinA
Frequently asked questions
Can I take Glycopyrronium with OnabotulinumtoxinA?
MediHelp rates the interaction as moderate. Glycopyrronium and OnabotulinumtoxinA 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. Botulinum toxin blocks acetylcholine release, and labeling warns that anticholinergic drugs may potentiate its systemic anticholinergic effects. Glycopyrronium could therefore add to dry mouth, blurred vision or generalized weakness after injection.
How serious is the interaction between Glycopyrronium and OnabotulinumtoxinA?
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 excessive weakness, swallowing or breathing difficulty and systemic anticholinergic effects after injection. Use the lowest effective glycopyrronium dose.
What other medicines interact with Glycopyrronium?
MediHelp also lists interactions of Glycopyrronium with, for example, Clozapine, Abobotulinumtoxina, Aclidinium. The full list is on the Glycopyrronium page.
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