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Mexiletine is a Class IB antiarrhythmic drug approved to treat symptomatic ventricular arrhythmias, including ventricular tachycardia. It stabilizes cardiac cell membranes by blocking fast sodium channels, which reduces abnormal electrical firing in the heart.

Mexiletine is typically taken two to three times daily with food or antacids to reduce the risk of nausea and gastrointestinal upset. Your physician will determine the appropriate dose based on your arrhythmia type, response to therapy, and tolerance. Do not adjust your dose without medical guidance.

Common side effects include nausea, vomiting, heartburn, dizziness, and tremor. Less common but more serious effects include worsening of arrhythmia, liver enzyme elevations, and blood count changes. Report any new or worsening symptoms to your doctor promptly.

Yes. Mexiletine can interact with several drugs, including other antiarrhythmics, certain antacids, rifampin, phenytoin, and drugs that alter urinary pH. These interactions can affect mexiletine blood levels or increase the risk of cardiac side effects. Always provide a complete medication list to your physician.

Yes. Your doctor may recommend periodic ECGs, liver function tests, and complete blood counts during mexiletine therapy. These tests help detect arrhythmia changes, liver effects, or blood disorders early. Ongoing monitoring is an important part of safe long-term use.

Mexiletine is generally not recommended for patients with cardiogenic shock, second- or third-degree heart block without a pacemaker, or certain other conduction defects. Patients with significant liver impairment require careful dosing and monitoring. A physician review of your cardiac and medical history is essential before a refill is issued.

After you complete a brief health questionnaire, Doctronic's AI system performs an initial evaluation of your symptoms, medications, and cardiac history. A licensed physician then reviews the full assessment and, if appropriate, issues a refill prescription and an individualized treatment plan, all without requiring an in-person visit.

Yes. Doctronic's platform is HIPAA-compliant, and all prescribing decisions are made by licensed physicians. Consultations are doctor-reviewed and audited to ensure clinical quality and patient safety. The platform is available to adults 18 and older in any U.S. state.