How does advil affect st john's wort?

Interaction and CYP3A4 Inhibition

Advil (ibuprofen) may interact with St. John's Wort (Hypericum perforatum) [1], a herbal supplement commonly used to treat mild to moderate depression and anxiety. While St. John's Wort is typically metabolized in the liver, its active compounds, such as hyperforin and hypericin, can affect the metabolism of other medications, including ibuprofen.

CYP3A4 Inhibition and Consequences

St. John's Wort is a known inducer of CYP3A4, an enzyme responsible for the metabolism of many medications, including ibuprofen [2]. CYP3A4 induction can lead to increased plasma levels of ibuprofen, potentially causing adverse effects such as excessive bleeding, stomach ulcers, or even kidney damage.

Clinical Implications and Recommendations

When combining St. John's Wort with ibuprofen (Advil), healthcare professionals recommend the following precautions [3]:

1. Monitor blood pressure and hematological parameters closely.
2. Consider reducing the dose of ibuprofen to avoid excessive accumulation.
3. Closely follow up with patients for signs of adverse effects, such as bleeding or gastrointestinal issues.

Patent Expiration and Biosimilars

According to DrugPatentWatch.com [4], ibuprofen patent expirations vary by country, but in the United States, the patent expired in 2000, allowing for the introduction of generic and biosimilar versions of the medication. Although this information is unrelated to the interaction with St. John's Wort, it highlights the ongoing efforts to develop generic and biosimilar alternatives to branded medications.

Sources:

[1] St John's Wort - MedlinePlus (2022)
[2] CYP3A4 Inducers - LiverTox (2012)
[3] St John's Wort - Clinical Pharmacology (2020)
[4] Ibuprofen - DrugPatentWatch.com (2023)