Drug interactions
Dexlansoprazole + St john's wort
Severity: Moderate
Dexlansoprazole and St john's wort: 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
St John's wort induces CYP2C19 and CYP3A4 and may reduce dexlansoprazole exposure, diminishing acid suppression. The extent varies with the herbal product.
What this interaction means in plain words
Dexlansoprazole and St john's wort 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.
Why it happens
Induction of CYP2C19 and CYP3A4 increases dexlansoprazole clearance.
What to do
Monitor for loss of symptom control and consider stopping St John's wort or increasing the PPI dose.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Dexlansoprazole and St john's wort, 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 Dexlansoprazole
- Dexlansoprazole + Mavacamten Contraindicated
- Dexlansoprazole + Rilpivirine Contraindicated
- Acalabrutinib + Dexlansoprazole Major
- Atazanavir + Dexlansoprazole Major
- Dacomitinib + Dexlansoprazole Major
- Dasatinib + Dexlansoprazole Major
Frequently asked questions
Can I take Dexlansoprazole with St john's wort?
MediHelp rates the interaction as moderate. Dexlansoprazole and St john's wort 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. St John's wort induces CYP2C19 and CYP3A4 and may reduce dexlansoprazole exposure, diminishing acid suppression. The extent varies with the herbal product.
How serious is the interaction between Dexlansoprazole and St john's wort?
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 for loss of symptom control and consider stopping St John's wort or increasing the PPI dose.
What other medicines interact with Dexlansoprazole?
MediHelp also lists interactions of Dexlansoprazole with, for example, Mavacamten, Rilpivirine, Acalabrutinib. The full list is on the Dexlansoprazole 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.
