Interactions between Advil and St. John's Wort are a possibility [1]. St. John's Wort is known to interact with many medications because it affects the way the body metabolizes them [2].
How Does St. John's Wort Affect Other Medications?
St. John's Wort can increase the activity of certain enzymes in the liver, primarily cytochrome P450 3A4 (CYP3A4) [2][3]. This enzyme is responsible for breaking down many drugs, including some that are commonly prescribed [3]. When CYP3A4 activity is increased, these drugs are processed more quickly by the body, which can lead to lower levels of the drug in the bloodstream and potentially reduce their effectiveness [3].
What Is Advil?
Advil is a brand name for ibuprofen [4]. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) used to reduce fever and treat pain and inflammation [4].
Can Advil and St. John's Wort Be Taken Together?
While ibuprofen itself is not typically metabolized by CYP3A4 to a significant extent, it is still advisable to exercise caution when combining it with St. John's Wort [1][3]. The primary concern with St. John's Wort is its broad impact on drug metabolism [2]. Although a direct, well-documented interaction between ibuprofen and St. John's Wort is not as extensively detailed as with other drug classes, the general principle of St. John's Wort affecting drug levels means potential interactions cannot be entirely ruled out [1][3].
What Are the Risks of Combining St. John's Wort with Medications?
Combining St. John's Wort with medications that are metabolized by CYP3A4 can lead to a decrease in the drug's efficacy [3]. This could mean a medication for a serious condition might not work as well as intended [3]. Conversely, St. John's Wort can also interfere with other enzymes and transporters, potentially leading to increased levels of certain drugs and associated toxicity [2].
Should I Talk to a Doctor Before Taking St. John's Wort?
Yes, it is highly recommended to speak with a healthcare professional before starting St. John's Wort, especially if you are taking any other medications, including over-the-counter drugs like Advil [1][2]. A doctor or pharmacist can review your current medications and advise on potential interactions and safety [1][2].
What Other Medications Interact with St. John's Wort?
St. John's Wort has a wide range of known interactions. It can decrease the effectiveness of birth control pills, antidepressants (SSRIs and others), blood thinners (like warfarin), heart medications (like digoxin), and immunosuppressants [2][3]. It can also interact with HIV medications and some cancer drugs [3].
Sources:
1. https://www.ncbi.nlm.nih.gov/books/NBK548717/
2. https://www.mayoclinic.org/drugs-supplements-st-johns-wort/art-20046112
3. https://www.webmd.com/vitamins/ai/ingredientmono-424/st-johns-wort
4. https://www.webmd.com/drugs/2/drug-5462/ibuprofen-oral/details