Based on PubMed | Can I safely use olive oil while taking omeprazole, or does olive oil interact with omeprazole?

You can generally use olive oil safely while taking omeprazole, and there is no evidence of a direct interaction between olive oil and omeprazole.

What omeprazole interacts with

• Omeprazole can change how other medicines are processed because it partially inhibits an enzyme in the liver called CYP2C19, which can raise levels of drugs that depend on this pathway. ^{[1] [2]}
• It also raises stomach pH (reduces acidity), which can change absorption of medicines that need acid to dissolve well, such as certain antifungals or some antivirals. ^{[2] [3]}
• Classic interaction examples include diazepam and phenytoin (via CYP2C19 effects), and reduced absorption of drugs like ketoconazole or atazanavir due to higher gastric pH. ^{[3] [4]}

Where olive oil fits in

• Olive oil is a dietary fat, not a drug that relies on CYP2C19 metabolism, so the enzyme effect of omeprazole is not expected to alter olive oil. ^[3]
• There is no established mechanism showing that olive oil would reduce or increase omeprazole’s effect; food may slow the rate of omeprazole absorption, but not the overall amount absorbed, and this is not specific to olive oil. ^[5]

Best practices for taking omeprazole

• To get the most consistent acid control, omeprazole is often taken before a meal so it can activate on acid pumps when you start eating. ^[1]
• If you prefer olive oil with meals for example on salads or for cooking you can continue this as part of a balanced diet without expecting a meaningful interaction with omeprazole. ^[5]

When to be cautious

• If you also take medicines known to interact with omeprazole (for example, clopidogrel, certain antifungals, or some antivirals), timing and selection of therapy may need attention, but this is unrelated to olive oil itself. ^{[2] [3] [4]}
• If you notice new digestive symptoms after changing your diet or supplement routine, it may be reasonable to adjust meal timing around your omeprazole and discuss with a clinician, especially if you use high-dose or long-term therapy. ^[2]

Quick summary

• Olive oil does not have a known clinically relevant interaction with omeprazole. ^[3]
• Omeprazole’s important interactions are mainly with certain medications through CYP2C19 inhibition and by reducing stomach acidity, not with common dietary fats like olive oil. ^{[2] [4]}