I do know that seizure medications can cause memory loss. I don't know anything about that particular one. Maybe you should go to the doctor and see if you can get a different medication. I am not a doctor so I can only go on what I know. Come back and update us.
Ahh vitamin B12 deficiency. I see you. I've had this deficiency and have permanent nerve damage. Was i misdiagnosed? You bet. Sublingual B12 - STAT!
"Commonly used antiepileptic drugs (AEDs) can cause vitamin B12 or folate deficiency, which is, in turn, associated with hyperhomocysteinemia, new research published in Annals of Neurology has found."
Zoloft - "SSRIs, selective serotonin reuptake inhibitors, are antidepressant medications that deplete B6, B12, folic acid, vitamin D and sodium."
Book: Could It Be B12?: An Epidemic of Misdiagnoses by Sally M. Pacholok, Jeffrey J. Stuart.
"It’s a public health crisis that the public doesn’t know exists. Millions suffer from it, but few are diagnosed. Its symptoms can look exactly like Alzheimer’s disease, depression or multiple sclerosis, so it’s routinely misdiagnosed. Left untreated, it can cause permanent, crippling nerve damage—and too many patients don’t get treatment until it’s too late.
This forgotten disorder is Vitamin B12 deficiency. B12 deficiency is easily detected and easily treated, but the medical profession is largely unaware of the danger, and few patients are screened for it."