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an oral antiarrhythmic drug.
indications It is prescribed for the treatment of symptomatic ventricular arrhythmias and suppression of premature ventricular contractions.
contraindications It is contraindicated in patients with cardiogenic shock or preexisting second- or third-degree atrioventricular block in the absence of a pacemaker.
adverse effects Among adverse effects reported are upper GI distress, lightheadedness, tremor, loss of coordination, diarrhea, sleep disorders, headache, visual disturbances, and palpitations.