Abnormal Wada and neuropsychological testing results due to topiramate therapy.
A 46-year-old man experienced intractable seizures since childhood. Due to lack of response to antiepilepsy drugs (AEDs), he underwent a surgical evaluation that was consistent with seizure onset in the left medial temporal lobe. While on topiramate and carbamazepine, his preoperative neuropsychological scores and sodium amytal (Wada) scores were low and may have excluded him from surgery. Repeat testing on lamotrigine and carbamazepine showed improvement in his scores, allowing him to undergo surgery. Physicians must therefore be cautious in evaluating such test scores while a patient is on topiramate.
McCabe
P H
PH
Department of Medicine (Section of Neurology), Pennsylvania State University College of Medicine, Milton S. Hershey Medical Center, Hershey, Pennsylvania 17033, USA. pmccabe@psghs.edu
Eslinger
P J
PJ
D000654:Amobarbital / Q000494:pharmacology; D000927:Anticonvulsants / Q000009:adverse effects* / Q000627:therapeutic use; D002220:Carbamazepine / Q000627:therapeutic use; D002343:Carotid Artery, Internal; D004359:Drug Therapy, Combination; D004833:Epilepsy, Temporal Lobe / Q000175:diagnosis* / Q000188:drug therapy* / Q000601:surgery; D005632:Fructose / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D007269:Injections, Intra-Arterial; D000077213:Lamotrigine; D008297:Male; D008569:Memory Disorders / Q000139:chemically induced / Q000175:diagnosis; D009483:Neuropsychological Tests / Q000706:statistics & numerical data*; D000077236:Topiramate; D014227:Triazines / Q000627:therapeutic use
D000927:Anticonvulsants; D014227:Triazines; D000077236:Topiramate; D005632:Fructose; D002220:Carbamazepine; D000654:Amobarbital; D000077213:Lamotrigine