Drug interactions
Diazepam + Orphenadrin
Severity: Moderate
Diazepam 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
Diazepam is a long-acting benzodiazepine and orphenadrine adds sedative and anticholinergic effects. Together they can cause marked drowsiness, impaired coordination, confusion and falls.
What this interaction means in plain words
Diazepam 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.
Diazepam belongs to Musculoskeletal; Orphenadrin belongs to Musculoskeletal.
Why it happens
Additive central nervous system depression via GABA-A enhancement and central antimuscarinic activity.
What to do
Use the lowest effective doses and monitor for oversedation. Advise against alcohol and driving until tolerance is established.
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 Diazepam
Frequently asked questions
Can I take Diazepam with Orphenadrin?
MediHelp rates the interaction as moderate. Diazepam 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. Diazepam is a long-acting benzodiazepine and orphenadrine adds sedative and anticholinergic effects. Together they can cause marked drowsiness, impaired coordination, confusion and falls.
How serious is the interaction between Diazepam 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: Use the lowest effective doses and monitor for oversedation. Advise against alcohol and driving until tolerance is established.
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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