What is quinidine used to treat?

Quinidine can be used to help bring the heart back into a normal rhythm in cases of certain types of abnormal heart rhythms (arrhythmias). Atrial fibrillation and atrial flutter are two abnormal heart rhythms that involve the top chambers of the heart the atria contracting in an abnormal way. Quinidine sulfate or quinidine gluconate may be used to bring the heart back into a normal rhythm if it is in atrial fibrillation or flutter, or it can help prevent atrial fibrillation (or flutter) from happening again. If your heart is beating in another abnormal rhythm, called ventricular arrhythmia, the abnormal pattern begins in the lower chambers of the heart the ventricles. Quinidine sulfate or gluconate may be used in cases of life-threatening ventricular arrhythmias as well. Finally, quinidine can be used to treat malaria, which is a disease that you can get when bitten by an infected mosquito.

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