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For example, when the blood pressure drug felodipine is taken with grapefruit juice rather than water, levels of the medication in the blood can more than double and result in headache, irregular ...
Grapefruit–drug interactions that affect the pre-systemic metabolism (i.e., the metabolism that occurs before the drug enters the blood) of drugs have a different duration of action than interactions that work by other mechanisms, such as on absorption, discussed below.
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 ...
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.
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.
The effect of grapefruit juice with regard to drug absorption was originally discovered in 1989. The first published report on grapefruit drug interactions was in 1991 in the Lancet entitled "Interactions of Citrus Juices with Felodipine and Nifedipine", and was the first reported food-drug interaction clinically. The effects of grapefruit last ...
Grapefruit can increase the amount of Cialis in your bloodstream. CYP3A4 (an enzyme in your intestine) is responsible for the metabolism of many drugs, including Cialis. Grapefruit can inhibit CYP3A4.