Drug interactions
Fentanyl + Fexofenadine
Severity: Minor
Fentanyl and Fexofenadine: minor 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
Fentanyl causes sedation and respiratory depression, and fexofenadine is minimally sedating, so additive effects are expected to be small. The opioid itself remains the main concern for CNS depression.
What this interaction means in plain words
Fentanyl and Fexofenadine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Fentanyl belongs to Musculoskeletal; Fexofenadine belongs to Respiratory.
Why it happens
Possible additive CNS depression; fexofenadine has limited central penetration.
What to do
Monitor sedation per usual opioid care. No change to fexofenadine is needed.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Fexofenadine
- Danicopan + Fexofenadine Moderate
- Erdafitinib + Fexofenadine Moderate
- Fexofenadine + Glecaprevir / pibrentasvir Moderate
- Fexofenadine + Grapefruit Moderate
- Fexofenadine + Juice Moderate
- Acrivastine + Fexofenadine Minor
Other interactions of Fentanyl
- Alvimopan + Fentanyl Contraindicated
- Fentanyl + Isocarboxazid Contraindicated
- Fentanyl + Olanzapine / samidorphan Contraindicated
- Fentanyl + Phenelzine Contraindicated
- Fentanyl + Tranylcypromine Contraindicated
- Alfentanil + Fentanyl Major
Frequently asked questions
Can I take Fentanyl with Fexofenadine?
MediHelp rates the interaction as minor. Fentanyl and Fexofenadine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Fentanyl causes sedation and respiratory depression, and fexofenadine is minimally sedating, so additive effects are expected to be small. The opioid itself remains the main concern for CNS depression.
How serious is the interaction between Fentanyl and Fexofenadine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor sedation per usual opioid care. No change to fexofenadine is needed.
What other medicines interact with Fexofenadine?
MediHelp also lists interactions of Fexofenadine with, for example, Danicopan, Erdafitinib, Glecaprevir / pibrentasvir. The full list is on the Fexofenadine page.
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