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[19] [31] For drugs recently sold on the market, drugs have information pages (monographs) that provide information on any potential interaction between a medication and grapefruit juice. [19] Because there is a growing number of medications that are known to interact with citrus, [ 1 ] patients should consult a pharmacist or physician before ...
Blood pressure drugs aren't the only commonly prescribed medications that grapefruit juice can mess with — they also include anticoagulants that help prevent blood clots, organ-transplant ...
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]
At a serving size of half a medium grapefruit, you’ll have 60 calories (zero from fat), 100 percent of your vitamin C requirement for the day, no sodium or cholesterol, 15 grams of carbohydrates ...
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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]
This prevents oxidative metabolism of certain drugs by the enzyme, resulting in an elevated concentration of drug in the bloodstream. Under normal circumstances, the grapefruit juice effect is considered to be a negative interaction, and patients are often warned not to consume grapefruit or its juice when taking medication.