Ibutilide Fumarate Oral is a class III antiarrhythmic drug and is recommended to be used under medical supervision. Ibutilide Fumarate Oral Drug is used for patients with recent episodes of atrial fibrillation or atrial flutter reversed into sinus rhythm, and long-term atrial arrhythmias. The specific dosage must be applied in conjunction with the condition and under the supervision of a doctor. Allergic to the drug is prohibited, individual patients in the use of drugs during the adverse reactions may occur, such as nausea, vomiting, skin itching, diarrhea, abdominal pain, etc., generally most patients are able to establish tolerance, if the adverse reactions are serious, should consult a doctor in a timely manner. Patients are advised to review the medication regularly and adjust the medication in time.