Quinidine is used in the treatment of arrhythmia.
How Quinidine works Quinidine is an anti-arrhythmic medication that functions by blocking abnormal electrical signals in the heart, helping to restore a normal rhythm to irregular heartbeats.
Common side effects of Quinidine include diarrhea, palpitations, upper abdominal pain, lightheadedness, visual disturbances, and tremors.