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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]
Grapefruit–drug interactions are common, as the juice contains furanocoumarins that interfere with the metabolism of many drugs. This can prolong and intensify the effects of those drugs, leading to multiple side-effects such as abnormal heart rhythms, bleeding inside the stomach, low blood pressure, difficulty breathing, and dizziness.
[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 ...
Grapefruit decreased drug metabolism in humans, which likely represented the first clinical example of a food producing such an effect. Clinically, the concern is that a single judicious amount of grapefruit ingested even many hours beforehand would noticeably boost oral drug bioavailability and cause overdose toxicity.
Naringenin is a flavanone from the flavonoid group of polyphenols. [2] It is commonly found in citrus fruits, especially as the predominant flavonone in grapefruit. [2]The fate and biological functions of naringenin in vivo are unknown, remaining under preliminary research, as of 2024. [2]
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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.
The best definition of a grapefruit is a grapefruit. Not a photo of a grapefruit, a botanical, chemical, or physical description of a grapefruit; not a list of places where grapefruits are grown or foods that may be combined with them—but the actual item.