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Oxycodone: Grapefruit juice enhances the exposure to oral oxycodone. In a randomized, controlled trial 12 healthy volunteers ingested 200 mL of either grapefruit juice or water three times daily for five days. On the fourth day 10 mg of oxycodone hydrochloride were administered orally.
"There are certain substances in grapefruit juice and grapefruit that may affect the way the body handles a medication," says Leonard. "This can result in fluctuating levels of a medication in the ...
That being the case, anyone taking Cialis should not eat grapefruit or drink grapefruit juice for three days before starting the medication. If you are taking a daily dose of Cialis (a.k.a ...
Grapefruit juice can act as an enzyme inhibitor, affecting the metabolism of drugs. In pharmaceutical sciences , drug interactions occur when a drug's mechanism of action is affected by the concomitant administration of substances such as foods, beverages, or other drugs.
Grapefruit and grapefruit juice have been found to interact with numerous drugs, in many cases resulting in adverse effects. [4] This happens in two ways: one is that grapefruit can block an enzyme which metabolizes medication, [5] and if the drug is not metabolized, then the level of the drug in the blood can become too high, leading to an adverse effect. [5]
The effects of grapefruit last from 3–7 days, with the greatest effects when juice is taken an hour previous to administration of the drug. [25] In addition to grapefruit, other fruits have similar effects. Noni (Morinda citrifolia), for example, is a dietary supplement typically consumed as a juice and also inhibits CYP3A4. [26]
Important: If you're taking statins or medications for conditions like high blood pressure, cholesterol, heart arrhythmia, organ transplants, or allergies, it can be dangerous to eat grapefruit.
A single glass of grapefruit juice can interfere with your body's ability to break down a medication. Here's how to protect your health.