Mexiletine (INN) (sold under the brand names Mexitil and NaMuscla) is a medication used to treat abnormal heart rhythms, chronic pain, and some causes of muscle stiffness. Common side effects include abdominal pain, chest discomfort, drowsiness, headache, and nausea. It works as a non-selective voltage-gated sodium channel blocker and belongs to the Class IB group of anti-arrhythmic medications.
1 Medical uses
2 Adverse effects
* May have multiple approval dates, manufacturers, or labelers.