Drug interactions
Clonazepam + Orphenadrine
Severity: Moderate
Clonazepam and Orphenadrine: 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 depress the central nervous system, so together they can cause excessive drowsiness, dizziness and impaired coordination. Orphenadrine's anticholinergic effects may add to confusion in older adults.
What this interaction means in plain words
Clonazepam and Orphenadrine 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 CNS depression from GABA-A potentiation and central anticholinergic/antihistaminic activity.
What to do
Use the lowest effective doses and warn the patient about driving or operating machinery. Monitor sedation and cognition, particularly in elderly patients.
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 Clonazepam
- Calcium / magnesium / potassium / sodium oxybates + Clonazepam Contraindicated
- Clonazepam + Sodium oxybate Contraindicated
- Alfentanil + Clonazepam Major
- Alprazolam + Clonazepam Major
- Amobarbital + Clonazepam Major
- Belladonna and opium + Clonazepam Major
Frequently asked questions
Can I take Clonazepam with Orphenadrine?
MediHelp rates the interaction as moderate. Clonazepam and Orphenadrine 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 depress the central nervous system, so together they can cause excessive drowsiness, dizziness and impaired coordination. Orphenadrine's anticholinergic effects may add to confusion in older adults.
How serious is the interaction between Clonazepam and Orphenadrine?
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 warn the patient about driving or operating machinery. Monitor sedation and cognition, particularly in elderly patients.
What other medicines interact with Clonazepam?
MediHelp also lists interactions of Clonazepam with, for example, Calcium / magnesium / potassium / sodium oxybates, Sodium oxybate, Alfentanil. The full list is on the Clonazepam page.
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