Hi, My Son Was Diagnosed With Rolandic Epilepsy About 3

Hi, my son was diagnosed with rolandic epilepsy about 3 years ago - he is now 9. He is taking 400 mg of Carbetrol in the morning and another 400 mg at night. He also has a stutter which seems to have begun right around the time that he was diagnosed. Is it possible that the Carbetrol could be the cause - or possibly a correlation with his seizures and speech?