Drug interactions
Amoxapine + Orphenadrin
Severity: Moderate
Amoxapine 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 have anticholinergic and sedative properties, so combined use can cause marked dry mouth, constipation, urinary retention, confusion and drowsiness. Older patients are particularly vulnerable.
What this interaction means in plain words
Amoxapine 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.
Why it happens
Additive antimuscarinic and CNS depressant effects.
What to do
Monitor for anticholinergic toxicity, sedation and cognitive changes, and lower the dose of either drug if these occur. Avoid in patients with glaucoma, urinary retention or dementia where possible.
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
Frequently asked questions
Can I take Amoxapine with Orphenadrin?
MediHelp rates the interaction as moderate. Amoxapine 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 have anticholinergic and sedative properties, so combined use can cause marked dry mouth, constipation, urinary retention, confusion and drowsiness. Older patients are particularly vulnerable.
How serious is the interaction between Amoxapine 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, sedation and cognitive changes, and lower the dose of either drug if these occur. Avoid in patients with glaucoma, urinary retention or dementia where possible.
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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