<prompt> Prolonged use of one of the following anticonvulsant can produce weight loss -GabapentinOxcarbazepineTopiramateValproic acid  <response>: Ans. is c i.e., Topiramate o Use of topiramate is limited by its unwanted side effects paicularly weight loss, sedation and naming difficulties. Note - Other drug causing weight loss is Felbamate. 