Which medications interact with grapefruit?

Some statins, certain blood-pressure (calcium channel blocker) medicines, some heart-rhythm and anti-anxiety medicines, and certain transplant/immune medicines. Not all medicines are affected — check yours with a pharmacist.

Does timing grapefruit away from my medicine help?

Not reliably. Grapefruit's effect on the gut enzyme can last many hours, so separating them often isn't enough. Ask your pharmacist whether to avoid grapefruit with your specific medicine.

Home › Guides › Grapefruit and medications: what to know

Grapefruit and medications: what to know

By the RxSafeCheck team · Educational, reviewed for plain-language clarity · Morning Mind LLC

It sounds like a myth, but it's real: grapefruit can change how your body handles certain medicines. Here's the plain-language version.

How grapefruit interacts

Grapefruit blocks an enzyme in your gut (called CYP3A4) that normally breaks medicines down. With that enzyme blocked, more of certain medicines gets absorbed — raising their levels and the chance of side effects. The effect can last many hours, so timing them apart doesn't reliably fix it.

Types of medicines often affected

Some cholesterol statins (like simvastatin, atorvastatin).
Certain blood pressure medicines (some calcium channel blockers).
Some heart-rhythm and anti-anxiety medicines.
Certain immune-suppressing and transplant medicines.

Seville oranges and pomelos can have a similar effect.

Not every medicine is affected — and you may not need to avoid grapefruit at all. Check your specific medicines with a pharmacist rather than assuming.

What to do

Read your medicine's information sheet for a grapefruit warning, ask your pharmacist, and check your list in RxSafeCheck, which flags grapefruit as a food factor against sensitive medicines.

Check your own medicines free

See how your prescriptions, supplements, and food may interact — organized by the part of the body they affect.

Open the medication tool →

Important: This article is educational and not medical advice. It does not replace your pharmacist or prescriber. Always confirm decisions about your medicines with a qualified professional, and call your local emergency number for emergencies. In the U.S., Poison Control is 1-800-222-1222.