Thanks for writing your query to us.
CR (carbemazepine)is an antiepileptic used to control epilepsy
. It has got many side effects & one of it is abnormal heart rhythm commonly called as arrhythmia
. Since you have being taking zeptol CR 400 BD , i would advise you to get your serum (blood) levels of carbemazepine. If it is high than its dose needs to be reduced & also get your ECG done during the episode of chest pain
. ECG done when you dont have chest pain will not pick up the abnormality of heart.
Wish you good health.