The Grapefruit/Medication Connection
The
human body produces an enzyme called CYO3A4 that, among other things,
helps break down certain chemicals before they are absorbed into the
bloodstream. Grapefruits contain a chemical that inhibits the CYO3A4
enzyme’s functions, which leads to more of the medication being absorbed
into the bloodstream. When the level of medication in the blood is too
high, you enter a state of overdose, which can lead to exacerbated
side-effects and even poisoning.
Other Citrus Fruits
The
inhibiting chemical in grapefruit can also be found in other citrus
fruits, such as pomelo, limes, and bitter oranges (a type of orange that
is very bitter and is mainly used in jams). It’s important to mention
that other species of oranges, as well as lemons - are safe to ingest,
as they don’t contain the aforementioned chemical.
Potential Severity of Reactions
It’s
difficult to predict the severity of reaction grapefruit juice will
have on one's body, as it can be affected by many variables. Different
juices contain different levels of the inhibiting chemical, meaning that
each type of juice can have a different level of effect. Additionally,
the quantity of juice consumed can have a drastically varied effect
according to one's weight.
Medications that Should Not Be Taken with Grapefruit Juice:
There
are currently more than 85 different medications that should not be
taken with grapefruit juice, and new drugs join the list every year. The
following list shows the drugs that pose the most danger when taken
with Grapefruit:
Heart Rate and Blood Pressure Medication |
Generic name |
Commercial names |
Amlodipine |
Norvasc |
Amiodarone |
Procor, Amiodacore, Amiocor |
Felodipine |
Logimax, Penedil |
Nifedipine |
Osmo-Adalat, Nifedipine-Teva, Pressolat, Megalat |
Nimodipine |
Nimotop |
Quinidin |
Quiniduran |
Verapamil |
Verapress, Apoacor, Ikacor, Ikapress, Veracor |
Lipid Lowering Medication |
Generic name |
Commercial names |
Atorvastatin |
Lipitor |
Lovastatin |
Lovalip |
Simvastatin |
Simovil, Simvacor,
Simvastatin-Teva
|
Tranquilizers and Psychiatric Medication |
Generic name |
Commercial names |
Buspirone |
Buspirol, Sorbon |
Clomipramine |
Anafranil, Maronil |
Diazepam |
Assival, Diaz, Valium |
Midazolam |
Dormicum, Midazol, Midazolam |
Pimozide |
Orap Forte |
Sertraline |
Lustral |
Other (Immunosuppressants, antihistamines, etc.) |
Generic name |
Commercial names |
Carbamazepine |
Carbi, Tegretol, Teril, Timonil |
Cisapride |
Prepulsid |
Cyclosporine |
Sangcya, Sandimmun, Deximune |
|
Itraconazole |
Sporanox |
Saquinavir |
Invirase, Fortovase |
Sirolimus |
Rapamune |
Tacrolimus |
Prograf |
|
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