What conditions is mexiletine used to treat?
Mexiletine is an antiarrhythmic medication used to treat certain abnormal heart rhythms (arrhythmias), especially ventricular arrhythmias. It works by stabilizing the electrical activity of the heart so the rhythm becomes more regular.
What kinds of irregular heartbeats does it target most?
Mexiletine is most often used for ventricular rhythm problems, including rhythms that can occur in people with structural or inherited heart conditions. It may be considered when other treatments are not suitable or do not work well enough.
How does it work in the body?
Mexiletine blocks sodium channels in heart cells, which slows electrical conduction and helps prevent abnormal electrical signals that drive arrhythmias.
Is mexiletine also used for nerve pain or muscle symptoms?
Mexiletine is sometimes used off-label for certain neuromuscular and nerve-related conditions (for example, when symptoms are linked to abnormal electrical activity of nerves or muscles), but its primary labeled use is for cardiac arrhythmias.
What should patients know before taking it?
Because it affects heart rhythm, mexiletine can be risky in people with certain conduction problems or uncontrolled heart disease. It also requires careful dosing and monitoring to reduce the chance of worsening arrhythmias or causing other side effects.
If you tell me the condition you’re asking about (heart rhythm vs. pain/muscle symptoms), I can narrow down the most relevant uses and typical scenarios.