Mexiletine is a Class IB antiarrhythmic medication used in the treatment of serious ventricular arrhythmias, including ventricular tachycardia and ventricular fibrillation. It works by blocking sodium channels in the heart muscle cells, helping to stabilise electrical activity and restore normal heart rhythm.
Mexiletine is taken orally in capsule form, and the dosage must be individually tailored by a healthcare professional based on the patient’s specific condition and clinical response. Strict adherence to dosing instructions is essential to ensure safety and efficacy.