Answer
Mexiletine can cause or worsen abnormal heart rhythms. ECG, ambulatory monitoring, echocardiography and electrolyte assessment help identify people at increased risk.
Sources for this answer
- Namuscla 83 mg hard capsules — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.