Hi,
I understand your concern regarding this and like any other medications,
side effects may or may not occur depending on the patient as well as if there are drug interactions with patient's present medicine. Topiramate extended-release capsules may cause drowsiness, dizziness, confusion, trouble concentrating, or vision changes. But may be worse if it is taken with alcohol or certain medicines. It is best that you check with your doctor for proper management. Take care and regards.