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The following side effects are common to most antiarrhythmics. Patients should notify their physician immediately if they experience any side effects, including:
- Drug-related arrhythmias (proarrhythmias)
- Allergic reaction
- Chest pain
- Shortness of breath or painful breathing
- Tachycardia (abnormally fast heartbeat)
- Bradycardia (abnormally slow heartbeat)
- Dizziness or lightheadedness
- Fainting (syncope)
- Metallic taste

This is only a partial list of the more serious side effects antiarrhythmics may cause. Again, patients should immediately contact their physician if they experience any unusual symptom that may be a side effect from medication. |