Drug interactions
Clonazepam + Crizotinib
Severity: Moderate
Clonazepam and Crizotinib: 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
Crizotinib inhibits CYP3A4 and may raise clonazepam concentrations, increasing sedation and psychomotor impairment. The magnitude is not well characterized for clonazepam specifically.
What this interaction means in plain words
Clonazepam and Crizotinib 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.
Clonazepam belongs to Central Nervous System; Crizotinib belongs to Oncology.
Why it happens
Crizotinib inhibition of CYP3A4 reduces clonazepam clearance.
What to do
Monitor for excessive sedation and consider reducing the clonazepam dose when starting crizotinib. Reassess if crizotinib is stopped.
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
Other interactions of Crizotinib
- Crizotinib + Flibanserin Contraindicated
- Crizotinib + Lomitapide Contraindicated
- Crizotinib + Lonafarnib Contraindicated
- Crizotinib + Pimozide Contraindicated
- Crizotinib + Saquinavir Contraindicated
- Crizotinib + Thioridazine Contraindicated
Frequently asked questions
Can I take Clonazepam with Crizotinib?
MediHelp rates the interaction as moderate. Clonazepam and Crizotinib 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. Crizotinib inhibits CYP3A4 and may raise clonazepam concentrations, increasing sedation and psychomotor impairment. The magnitude is not well characterized for clonazepam specifically.
How serious is the interaction between Clonazepam and Crizotinib?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for excessive sedation and consider reducing the clonazepam dose when starting crizotinib. Reassess if crizotinib is stopped.
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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