Does Advil (ibuprofen) interact with St. John’s wort?
Yes. St. John’s wort can interact with many medicines by changing how the body metabolizes drugs. Because St. John’s wort affects liver enzymes and drug transporters, it may lower the levels of some medications, which can reduce their effects or change side-effect risk [1]. Advil (ibuprofen) is metabolized in the liver, so this is a plausible interaction, even though specific “ibuprofen + St. John’s wort” effects aren’t always spelled out in every drug database.
What could happen if you take Advil with St. John’s wort?
The main concern is reduced medicine levels or altered drug handling from enzyme induction by St. John’s wort [1]. For ibuprofen, that could mean your pain- or fever-control might be less predictable. St. John’s wort may also increase the chance of side effects if it affects drug levels in either direction, depending on your dose, other medicines, and your liver enzyme baseline [1].
Is the risk higher with long-term or high-dose Advil?
Risk can increase with higher ibuprofen exposure because Advil already carries well-known risks (especially gastrointestinal irritation/ulcers and kidney effects in susceptible people). If St. John’s wort is changing ibuprofen handling, the safest approach is to avoid combining them unless your clinician or pharmacist says it’s okay, particularly for frequent or long-term ibuprofen use [1].
What other interactions matter more than St. John’s wort?
With ibuprofen, interactions that are often more clinically prominent include combining it with other medicines that raise bleeding risk or affect kidneys (for example, certain anticoagulants/antiplatelets, and some blood pressure or kidney-impacting drugs). If you’re taking St. John’s wort, you also have to consider its broad interaction profile with many medications beyond pain relievers [1].
What should you do if you already take both?
Check your other medications and your overall risk factors (history of ulcers or kidney disease, older age, dehydration, heavy alcohol use). If you need ibuprofen regularly, ask a pharmacist or clinician to review your full medication list for interaction risk from St. John’s wort [1]. If you want to avoid the interaction, consider using an alternative pain/fever medicine only if your clinician says it’s appropriate for you.
When to get medical help
Get urgent care if you have signs of GI bleeding (black/tarry stools, vomiting blood), severe stomach pain, reduced urination/swelling, or an allergic reaction (hives, facial swelling, trouble breathing).
Sources
- National Center for Complementary and Integrative Health (NCCIH). “St. John’s Wort: What You Need To Know.” https://www.nccih.nih.gov/health/st-johns-wort-and-drug-interactions