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Understand the warning. Check the source.

Check Drug Interactions (CDI) makes technical drug information easier to understand. Each explanation below identifies its primary source, distinguishes source wording from our summary, and states what the explanation cannot tell you.

Why can grapefruit affect some statins?

Grapefruit can interfere with how the body handles certain medicines. The effect depends on the specific drug.

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Why does warfarin labeling warn about aspirin?

Warfarin labeling lists aspirin among medicines that increase bleeding risk when taken with warfarin.

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These educational pages do not add interaction records or replace professional advice. Read our editorial policy or check a medication list.

CDI: source-linked explanations