Drug interactions
Brompheniramine + Phentermine
Severity: Minor
Brompheniramine and Phentermine: 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
Phentermine is a stimulant anorectic and brompheniramine is a sedating antihistamine, so their CNS effects tend to oppose each other. No clinically important interaction is well established, though anticholinergic effects could add to tachycardia.
What this interaction means in plain words
Brompheniramine and Phentermine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Brompheniramine belongs to Respiratory; Phentermine belongs to Central Nervous System.
Why it happens
No established mechanism; opposing CNS effects.
What to do
No specific intervention is needed. Monitor heart rate and blood pressure if symptoms occur.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Brompheniramine and Phentermine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Brompheniramine
Other interactions of Phentermine
- Isocarboxazid + Phentermine Contraindicated
- Linezolid + Phentermine Contraindicated
- Phenelzine + Phentermine Contraindicated
- Phentermine + Procarbazine Contraindicated
- Phentermine + Rasagiline Contraindicated
- Phentermine + Selegiline Contraindicated
Frequently asked questions
Can I take Brompheniramine with Phentermine?
MediHelp rates the interaction as minor. Brompheniramine and Phentermine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Phentermine is a stimulant anorectic and brompheniramine is a sedating antihistamine, so their CNS effects tend to oppose each other. No clinically important interaction is well established, though anticholinergic effects could add to tachycardia.
How serious is the interaction between Brompheniramine and Phentermine?
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 specific intervention is needed. Monitor heart rate and blood pressure if symptoms occur.
What other medicines interact with Brompheniramine?
MediHelp also lists interactions of Brompheniramine with, for example, Alfentanil, Belladonna and opium, Benzhydrocodone / acetaminophen. The full list is on the Brompheniramine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
