Elexacaftor, tezacaftor, and ivacaftor and St. John's wort interaction
Elexacaftor, tezacaftor, and ivacaftor and St. John's wort: the Elexacaftor, tezacaftor, and ivacaftor prescribing label describes an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Elexacaftor, tezacaftor, and ivacaftor (Trikafta) label · effective 2026-06-22
John's wort ( Hypericum perforatum ) Strong or Moderate CYP3A Inhibitors The dosage of TRIKAFTA should be reduced when used concomitantly with strong CYP3A inhibitors [see Dosage and Administration (2.4) and Warnings and Precautions (5.6) ] .
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.