Drug interactions
Orphenadrin + Sodium oxybate
Severity: Major
Orphenadrin and Sodium oxybate: 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
Sodium oxybate is a potent CNS depressant, and orphenadrine adds sedation. Together they may cause profound sedation, respiratory depression, coma and death.
What this interaction means in plain words
Orphenadrin and Sodium oxybate 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.
Orphenadrin belongs to Musculoskeletal; Sodium oxybate belongs to Central Nervous System.
Why it happens
Additive CNS and respiratory depression through pharmacodynamic synergy.
What to do
Avoid the combination when possible and choose a non-sedating alternative. If it is unavoidable, use the lowest doses for the shortest time and monitor sedation and respiratory function.
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
Other interactions of Sodium oxybate
- Alprazolam + Sodium oxybate Contraindicated
- Amobarbital + Sodium oxybate Contraindicated
- Butorphanol + Sodium oxybate Contraindicated
- Chloral hydrate + Sodium oxybate Contraindicated
- Clonazepam + Sodium oxybate Contraindicated
- Clorazepate + Sodium oxybate Contraindicated
Frequently asked questions
Can I take Orphenadrin with Sodium oxybate?
MediHelp rates the interaction as major. Orphenadrin and Sodium oxybate 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. Sodium oxybate is a potent CNS depressant, and orphenadrine adds sedation. Together they may cause profound sedation, respiratory depression, coma and death.
How serious is the interaction between Orphenadrin and Sodium oxybate?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination when possible and choose a non-sedating alternative. If it is unavoidable, use the lowest doses for the shortest time and monitor sedation and respiratory function.
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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