Drug interactions
Orphenadrin + Quetiapine
Severity: Moderate
Orphenadrin and Quetiapine: 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 cause sedation, and each also has anticholinergic properties. Combined use may increase drowsiness, impair psychomotor performance and worsen anticholinergic effects such as dry mouth, constipation and confusion.
What this interaction means in plain words
Orphenadrin and Quetiapine 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.
Orphenadrin belongs to Musculoskeletal; Quetiapine belongs to Central Nervous System.
Why it happens
Additive CNS depression and anticholinergic activity.
What to do
Start with low doses and monitor sedation and anticholinergic effects, especially in older adults. Advise patients to avoid driving until the response is known.
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 Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Frequently asked questions
Can I take Orphenadrin with Quetiapine?
MediHelp rates the interaction as moderate. Orphenadrin and Quetiapine 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 cause sedation, and each also has anticholinergic properties. Combined use may increase drowsiness, impair psychomotor performance and worsen anticholinergic effects such as dry mouth, constipation and confusion.
How serious is the interaction between Orphenadrin and Quetiapine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Start with low doses and monitor sedation and anticholinergic effects, especially in older adults. Advise patients to avoid driving until the response is known.
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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