Answer
Caution is needed with some antiarrhythmics, including mexiletine and amiodarone, because cardiac effects may add together. Interactions are less likely with correctly used short-term topical cream.
Sources for this answer
- Lidocaine Grunenthal 700 mg medicated plaster — Current selected SmPCemc · Summary of Product Characteristics
- LMX4 Lidocaine 4% w/w Cream — 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.