I have the artistic talent of a one legged goat, but I do experience similar. I'm normally very knowledgeable on a wide number of topics, I can spot a misspelt word on a page almost immediately and I can speak eloquently. But, with the meds I find that everything goes out of reach, be it facts or words when I'm speaking. It's really very frustrating as they are things I'm good at and proud of being good at. I found that Depakote was the worst for it, but now I'm on Lithium so hoping it might get better (probably not with my luck).