Drug interactions
Glycopyrrolate inhaled + Oxybutynin
Severity: Moderate
Glycopyrrolate inhaled and Oxybutynin: 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
Inhaled glycopyrrolate has low systemic absorption but still contributes some antimuscarinic effect that can add to oral oxybutynin. This may modestly increase dry mouth, urinary retention, constipation and other anticholinergic effects.
What this interaction means in plain words
Glycopyrrolate inhaled and Oxybutynin 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 receptor blockade.
What to do
Monitor for urinary retention, constipation and dry mouth, especially in men with prostatic enlargement and in older adults; reduce or stop one agent if effects emerge.
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 Oxybutynin
Frequently asked questions
Can I take Glycopyrrolate inhaled with Oxybutynin?
MediHelp rates the interaction as moderate. Glycopyrrolate inhaled and Oxybutynin 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. Inhaled glycopyrrolate has low systemic absorption but still contributes some antimuscarinic effect that can add to oral oxybutynin. This may modestly increase dry mouth, urinary retention, constipation and other anticholinergic effects.
How serious is the interaction between Glycopyrrolate inhaled and Oxybutynin?
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 dry mouth, especially in men with prostatic enlargement and in older adults; reduce or stop one agent if effects emerge.
What other medicines interact with Oxybutynin?
MediHelp also lists interactions of Oxybutynin with, for example, Bethanechol, Clozapine, Potassium chloride. The full list is on the Oxybutynin page.
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