Drug interactions
Opium tincture + Orphenadrin
Severity: Major
Opium tincture and Orphenadrin: major 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 agents cause CNS depression, and opium tincture is a potent opioid. Together they can produce profound sedation and respiratory depression, and additive constipation and urinary retention from anticholinergic effects may also occur.
What this interaction means in plain words
Opium tincture and Orphenadrin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive CNS and respiratory depression via opioid receptor agonism and orphenadrine's central effects, plus additive antimuscarinic gut effects.
What to do
Use the lowest effective doses for the shortest time and monitor sedation and respiratory rate. Watch for ileus and urinary retention.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Orphenadrin
Frequently asked questions
Can I take Opium tincture with Orphenadrin?
MediHelp rates the interaction as major. Opium tincture and Orphenadrin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both agents cause CNS depression, and opium tincture is a potent opioid. Together they can produce profound sedation and respiratory depression, and additive constipation and urinary retention from anticholinergic effects may also occur.
How serious is the interaction between Opium tincture and Orphenadrin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective doses for the shortest time and monitor sedation and respiratory rate. Watch for ileus and urinary retention.
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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