Does St Johns Wort Interact with Quetiapine?
CDI records a major classification for St Johns Wort and Quetiapine. The stored summary is: Potent CYP3A4 inducer increases quetiapine clearance; increase quetiapine dose up to 5-fold during chronic use and reduce by 5-fold within 7-14 days of discontinuation. The mechanism involves cyp3a4 induction. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This record was extracted from drug labeling through openFDA. NIH/NLM RxNorm is used for drug identities. The summary and severity classification are CDI's processed information, not a verbatim source quotation. Product, route, and patient circumstances matter.
- Severity
- Major
- Quetiapine Class
- Atypical Antipsychotic
- Management
- Close medical supervision required
- Data Source
- U.S. FDA via OpenFDA
Recorded Mechanism
CYP3A4 induction
What To Tell Your Doctor or Pharmacist
If you are taking St Johns Wort and your doctor is considering prescribing Quetiapine (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask how frequently you should be monitored while these are co-prescribed
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider