Drug Interaction Report

Magnesium hydroxide may increase the blood levels and effects of quiNIDine in some people. Contact your doctor if you experience ringing in the ears, hearing loss, visual problems, diarrhea, headache, dizziness, lightheadedness, fainting, or fast or pounding heartbeats during treatment with these medications, as they may be symptoms of excessive effects of quiNIDine. You may need a dose adjustment or special tests to safely use both medications. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Do not consume grapefruit or grapefruit juice during treatment with quiNIDine unless specifically directed otherwise by your doctor. Grapefruit and grapefruit juice can interact with quiNIDine and increase the levels of quiNIDine in your body. If you are already consuming grapefruit products, do not increase or decrease the amount of these products in your diet without first talking to your doctor.