Health Canada is advising the public not to take certain drugs with grapefruit juice.
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Although interactions between grapefruit juice and certain drugs are well documented in the medical and scientific literature, this information may be unknown to the public.
There are several substances in grapefruit which interfere with the way the human body handles certain drugs. Consuming grapefruit juice (fresh or frozen) or grapefruit sections can increase, or less commonly decrease, the effects of some drugs, which could lead to serious or even life-threatening adverse reactions. As little as one glass of grapefruit juice (8oz/250mL) can cause this effect.
Certain drugs and health products used in the treatment of the following medical conditions are known to cause this effect: anxiety, depression, high blood pressure, HIV/AIDS, cancer, irregular heart rhythms, infections, psychotic problems, erectile dysfunction, angina, convulsions, gastrointestinal reflux, high lipid (cholesterol) levels and organ graft rejections.
A communique from the organisation reads: “The public is advised NOT to drink grapefruit juice or eat grapefruit in any form, if you are taking medication for any of the conditions listed above, until you have talked to your doctor or your pharmacist about the potential for an adverse reaction.
“Also as a precaution, AVOID taking any drug with grapefruit juice until you have asked your doctor or pharmacist if it is safe to do so.”
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By GlobalDataWhile sweet oranges and their juice do not appear to cause the same reaction, sour orange juice such as that from Seville oranges, may have an effect similar to grapefruit juice. Tangelos are a hybrid of grapefruit and may also interfere with drugs. Most other citrus fruits, such as lemons, limes, citrons, naturally sweet oranges and tangerines are considered safe.
