Prolonged use of one of the following anticonvulsant drugs can produce weight loss:: (A) Gabapentin, (B) Oxcarbazepine, (C) Topiramate, (D) Valproic acid
Answer is C. Adverse effects are impairment of attention, sedation , ataxia, word finding difficulty, poor memory, weight loss, paresthesia and renal stones. All the other drugs donot cause weight loss. Ref: K D Tripati 8 th edition