Drug interactions
Elranatamab + Fentanyl
Severity: Moderate
Elranatamab and Fentanyl: 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
Elranatamab causes cytokine release syndrome, and raised cytokines can temporarily suppress CYP enzyme activity. This may increase fentanyl exposure and opioid effects, mainly during step-up dosing and around CRS episodes.
What this interaction means in plain words
Elranatamab and Fentanyl 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.
Elranatamab belongs to Oncology; Fentanyl belongs to Musculoskeletal.
Why it happens
Cytokine-mediated suppression of CYP3A4 reduces fentanyl metabolism.
What to do
Monitor for excess sedation and respiratory depression during step-up dosing and for about 2 weeks after the first treatment dose, and during CRS. Lower the fentanyl dose if needed.
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 Fentanyl
- Alvimopan + Fentanyl Contraindicated
- Fentanyl + Isocarboxazid Contraindicated
- Fentanyl + Olanzapine / samidorphan Contraindicated
- Fentanyl + Phenelzine Contraindicated
- Fentanyl + Tranylcypromine Contraindicated
- Alfentanil + Fentanyl Major
Other interactions of Elranatamab
- Elranatamab + Ergotamine Major
- Elranatamab + Pimozide Major
- Bendamustine + Elranatamab Moderate
- Carbamazepine + Elranatamab Moderate
- Clomipramine + Elranatamab Moderate
- Clozapine + Elranatamab Moderate
Frequently asked questions
Can I take Elranatamab with Fentanyl?
MediHelp rates the interaction as moderate. Elranatamab and Fentanyl 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. Elranatamab causes cytokine release syndrome, and raised cytokines can temporarily suppress CYP enzyme activity. This may increase fentanyl exposure and opioid effects, mainly during step-up dosing and around CRS episodes.
How serious is the interaction between Elranatamab and Fentanyl?
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 excess sedation and respiratory depression during step-up dosing and for about 2 weeks after the first treatment dose, and during CRS. Lower the fentanyl dose if needed.
What other medicines interact with Fentanyl?
MediHelp also lists interactions of Fentanyl with, for example, Alvimopan, Isocarboxazid, Olanzapine / samidorphan. The full list is on the Fentanyl page.
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