Before taking quinidine,
tell your doctor and pharmacist if you are allergic to quinidine, quinine, or any other drugs.
tell your doctor and pharmacist what prescription and nonprescription medications you are taking, especially anticoagulants ('blood thinners') such as warfarin (Coumadin); antidepressants; cimetidine (Tagamet); codeine products; diltiazem (Cardizem, Dilacor, Tiazac); medication for heart disease or high blood pressure; medications for seizures, sleep, or an infection; and vitamins.
tell your doctor if you have an infection or have or have ever had myasthenia gravis; heart, kidney, or liver disease; or muscle weakness.
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking quinidine, call your doctor.
if you are having surgery, including dental surgery, tell the doctor or dentist that you are taking quinidine.
you should know that this drug may make you dizzy. Do not drive a car or operate machinery until you know how this drug affects you.
remember that alcohol can add to the dizziness caused by this drug.
talk to your doctor about the use of cigarettes and caffeine-containing beverages. These products may increase the irritability of your heart and interfere with the action of quinidine.
do not change brands of medication without talking to your doctor.
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