Why can grapefruit affect some statins?
All explanationsGrapefruit can interfere with how the body handles certain medicines. The effect depends on the specific drug.
What the source says
Grapefruit juice can block the action of intestinal CYP3A4
FDA: Grapefruit Juice and Some Drugs Don't Mix — How Grapefruit Juice Can Interfere With Medications. Source checked . This is a source check, not a claim of clinical review.
In plain language
CYP3A4 is an enzyme in the small intestine that helps break down many medicines. FDA explains that grapefruit can block this process, allowing more of an affected medicine to reach the blood.
FDA names simvastatin and atorvastatin as examples of statins that can be affected. Higher exposure to certain statins can increase the risk of muscle and liver damage.
What this explanation does not establish
This does not apply equally to every statin or every medicine. FDA notes that effects vary by drug, person, and amount of juice. Some other medicines can have reduced absorption instead.
A question for your pharmacist or prescriber
Does my specific medicine interact with grapefruit, and what does its current label say?
Do not change your medication based on this page. A pharmacist or prescriber can interpret the source in the context of your care.
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