Oregano oil may interfere with your meds, new study warns
NCT ID NCT06693960
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This early-phase trial at Washington State University is testing whether oregano supplements affect how the body breaks down common drugs. Sixteen healthy adults will take oregano oil alongside a cocktail of five drugs (caffeine, dextromethorphan, losartan, midazolam, and omeprazole). Researchers will measure drug levels in the blood to see if oregano changes their metabolism. The goal is to understand potential herb-drug interactions, not to treat any disease.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- oregano oil (dietary supplement)
- What this could lead to
- If it works, this could help people know whether taking oregano supplements changes how their medications work.
- What could go wrong
- This is a very small, early-phase study in healthy people, not patients. Results may not apply to everyone, and oregano might not affect drug metabolism at all.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Washington State University College of Pharmacy and Pharmaceutical Sciences
RECRUITINGSpokane, Washington, 99202, United States
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