Drug interactions
Atropine + Dimenhydrinate
Severity: Moderate
Atropine and Dimenhydrinate: 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
Dimenhydrinate contains diphenhydramine, which has anticholinergic activity that adds to that of atropine. This can cause dry mouth, urinary retention, constipation, tachycardia, blurred vision and confusion, especially in older adults.
What this interaction means in plain words
Atropine and Dimenhydrinate 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; Dimenhydrinate belongs to Respiratory.
Why it happens
Additive antimuscarinic effects at cholinergic receptors.
What to do
Monitor for anticholinergic toxicity such as tachycardia, urinary retention and confusion. Limit combined use in elderly patients or those with glaucoma or urinary obstruction.
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 Atropine
- Atropine + Eluxadoline Major
- Atropine + Henbane Major
- Atropine + Pramlintide Major
- Abobotulinumtoxina + Atropine Moderate
- Aclidinium + Atropine Moderate
- Amantadine + Atropine Moderate
Other interactions of Dimenhydrinate
Frequently asked questions
Can I take Atropine with Dimenhydrinate?
MediHelp rates the interaction as moderate. Atropine and Dimenhydrinate 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. Dimenhydrinate contains diphenhydramine, which has anticholinergic activity that adds to that of atropine. This can cause dry mouth, urinary retention, constipation, tachycardia, blurred vision and confusion, especially in older adults.
How serious is the interaction between Atropine and Dimenhydrinate?
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 such as tachycardia, urinary retention and confusion. Limit combined use in elderly patients or those with glaucoma or urinary obstruction.
What other medicines interact with Atropine?
MediHelp also lists interactions of Atropine with, for example, Eluxadoline, Henbane, Pramlintide. The full list is on the Atropine page.
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