Drug interactions
Atropine + Orphenadrin
Severity: Moderate
Atropine and Orphenadrin: 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 drugs block muscarinic receptors, so combined use can cause additive dry mouth, blurred vision, tachycardia, constipation, urinary retention and confusion. Elderly patients and those with glaucoma are most vulnerable.
What this interaction means in plain words
Atropine and Orphenadrin 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; Orphenadrin belongs to Musculoskeletal.
Why it happens
Additive antimuscarinic effects.
What to do
Monitor for anticholinergic toxicity including tachycardia, urinary retention and delirium. Reduce doses or avoid the combination in patients with narrow-angle glaucoma or obstructive uropathy.
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 Orphenadrin
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 Orphenadrin?
MediHelp rates the interaction as moderate. Atropine and Orphenadrin 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 drugs block muscarinic receptors, so combined use can cause additive dry mouth, blurred vision, tachycardia, constipation, urinary retention and confusion. Elderly patients and those with glaucoma are most vulnerable.
How serious is the interaction between Atropine and Orphenadrin?
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 tachycardia, urinary retention and delirium. Reduce doses or avoid the combination in patients with narrow-angle glaucoma or obstructive uropathy.
What other medicines interact with Orphenadrin?
MediHelp also lists interactions of Orphenadrin with, for example, Alfentanil, Amobarbital, Benzhydrocodone / acetaminophen. The full list is on the Orphenadrin page.
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