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quinidine gluconate

Interactions

Quinidine/Grapefruit Juice Interaction

This information is generalized and not intended as specific medical advice. Consult your healthcare professional before taking or discontinuing any drug, changing your diet or commencing any course of treatment.

Medical warning:

Important. Possible changes in your diet, medicine, or dosage should be discussed with your doctor or pharmacist.

How the interaction occurs:

Grapefruit juice slows down the absorption of quinidine from the gut. It also slows down the breakdown of quinidine by your liver. This results in a delayed effect of the drug.

What might happen:

Quinidine might not be able to control problems associated with your hear rate and rhythm.

What you should do about this interaction:

While you are taking this medicine, you should avoid eating grapefruit or drink grapefruit juice. You may choose an alternative citrus beverage (such as orange juice).In the event that you are instructed by a healthcare professional (e.g., doctor, pharmacist, or dietitian) to eat grapefruit or drink grapefruit juice, you should immediately discuss with doctor the effects of grapefruit on the blood levels of this medicine. If you notice an increase in any side effect from your medicine, contact your doctor.Your healthcare professionals may be aware of this interaction and may be monitoring you for it. Do not start, stop, or change your medicine or diet before checking with them first.

References:

1.Ochs HR, Greenblatt DJ, Woo E. Clinical pharmacokinetics of quinidine. Clin Pharmacokinet 1980 Mar-Apr;5(2):150-68.

2.Schubert W, Eriksson U, Edgar B, Cullberg G, Hedner T. Flavonoids in grapefruit juice inhibit the in vitro hepatic metabolism of 17 beta-estradiol. Eur J Drug Metab Pharmacokinet 1995 Jul-Sep;20(3):219-24.

3.Min DI, Ku YM, Geraets DR, Lee H. Effect of grapefruit juice on the pharmacokinetics and pharmacodynamics of quinidine in healthy volunteers. J Clin Pharmacol 1996 May;36(5):469-76.

Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, expect as may be authorized by the applicable terms of use.

CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.

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