Drug interactions
Fentanyl transmucosal + Fexofenadine
Severity: Minor
Fentanyl transmucosal 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
Fexofenadine has very little sedative activity, so any added CNS depression with transmucosal fentanyl is expected to be negligible.
What this interaction means in plain words
Fentanyl transmucosal 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.
Why it happens
Fexofenadine barely enters the CNS, so pharmacodynamic additive sedation is only theoretical.
What to do
No adjustment is needed; monitor sedation as routine for opioid use.
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
Frequently asked questions
Can I take Fentanyl transmucosal with Fexofenadine?
MediHelp rates the interaction as minor. Fentanyl transmucosal 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. Fexofenadine has very little sedative activity, so any added CNS depression with transmucosal fentanyl is expected to be negligible.
How serious is the interaction between Fentanyl transmucosal 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: No adjustment is needed; monitor sedation as routine for opioid use.
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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