Drug interactions
Brompheniramine + Fentanyl
Severity: Moderate
Brompheniramine 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
Brompheniramine is a sedating antihistamine with anticholinergic activity, and it adds to the CNS depression of fentanyl. The anticholinergic effect may also add to opioid-induced constipation and urinary retention.
What this interaction means in plain words
Brompheniramine 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.
Brompheniramine belongs to Respiratory; Fentanyl belongs to Musculoskeletal.
Why it happens
Additive CNS depression and additive anticholinergic effects on gut and bladder.
What to do
Monitor sedation and respiratory status, and check for urinary retention and constipation. Prefer a non-sedating antihistamine if one is 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 Brompheniramine
Frequently asked questions
Can I take Brompheniramine with Fentanyl?
MediHelp rates the interaction as moderate. Brompheniramine 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. Brompheniramine is a sedating antihistamine with anticholinergic activity, and it adds to the CNS depression of fentanyl. The anticholinergic effect may also add to opioid-induced constipation and urinary retention.
How serious is the interaction between Brompheniramine 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 sedation and respiratory status, and check for urinary retention and constipation. Prefer a non-sedating antihistamine if one is 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.
Full monographs, dosing and an interaction checker in the MediHelp app
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