Drug interactions
Atropine + Oxybutynin
Severity: Moderate
Atropine 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
Both are antimuscarinic agents, and combined systemic use can cause additive anticholinergic effects including dry mouth, tachycardia, urinary retention, constipation, blurred vision and delirium. Elderly patients are at greatest risk.
What this interaction means in plain words
Atropine 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.
Atropine belongs to Miscellaneous; Oxybutynin belongs to Genitourinary.
Why it happens
Additive muscarinic receptor blockade.
What to do
Monitor for anticholinergic toxicity, including heart rate, bowel and bladder function and mental status. Avoid unnecessary duplication of antimuscarinic therapy.
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
Other interactions of Atropine
- Atropine + Eluxadoline Major
- Atropine + Henbane Major
- Atropine + Pramlintide Major
- Abobotulinumtoxina + Atropine Moderate
- Aclidinium + Atropine Moderate
- Amantadine + Atropine Moderate
Frequently asked questions
Can I take Atropine with Oxybutynin?
MediHelp rates the interaction as moderate. Atropine 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. Both are antimuscarinic agents, and combined systemic use can cause additive anticholinergic effects including dry mouth, tachycardia, urinary retention, constipation, blurred vision and delirium. Elderly patients are at greatest risk.
How serious is the interaction between Atropine 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 anticholinergic toxicity, including heart rate, bowel and bladder function and mental status. Avoid unnecessary duplication of antimuscarinic therapy.
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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