July 11 (UPI) -- A drug used to treat seizures, nerve pain and restless leg syndrome might be linked with increased risk of dementia, a new study says. Regular gabapentin use appeared to increase risk of dementia by 29% and mild cognitive impairment by 85%, researchers reported Thursday in the journal Regional Anesthesia & Pain Medicine . What's more, the risk was more than doubled in people normally considered too young to suffer from brain aging, those 18 to 64, results show. "The findings of