Drug interactions
Phenobarbital + Rabeprazole
Severity: Minor
Phenobarbital and Rabeprazole: 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
Phenobarbital is a broad enzyme inducer that may lower PPI concentrations. Rabeprazole is less affected than other PPIs, so the impact is likely small but acid suppression could be reduced.
What this interaction means in plain words
Phenobarbital and Rabeprazole 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
Phenobarbital induces CYP3A4 and CYP2C19, which may increase rabeprazole metabolism.
What to do
Monitor symptom control and raise the rabeprazole dose if response is inadequate.
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 Phenobarbital and Rabeprazole, 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 14 days on the web. No card needed.
Other interactions of Rabeprazole
- Rabeprazole + Rilpivirine Contraindicated
- Acalabrutinib + Rabeprazole Major
- Atazanavir + Rabeprazole Major
- Dacomitinib + Rabeprazole Major
- Dasatinib + Rabeprazole Major
- Erlotinib + Rabeprazole Major
Frequently asked questions
Can I take Phenobarbital with Rabeprazole?
MediHelp rates the interaction as minor. Phenobarbital and Rabeprazole have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Phenobarbital is a broad enzyme inducer that may lower PPI concentrations. Rabeprazole is less affected than other PPIs, so the impact is likely small but acid suppression could be reduced.
How serious is the interaction between Phenobarbital and Rabeprazole?
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 symptom control and raise the rabeprazole dose if response is inadequate.
What other medicines interact with Rabeprazole?
MediHelp also lists interactions of Rabeprazole with, for example, Rilpivirine, Acalabrutinib, Atazanavir. The full list is on the Rabeprazole 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.
