Okay, Here's my experience. I'm a 55 year old woman with bipolar disorder, OCD, and PTSD. I've been on a lot of meds. My cognitive abilities have become severely affected by the years of meds. There is no doubt about that. Once upon a time, I was highly intelligent, had an exceptional vocabulary, and was an ace speller. (I sucked at math, but that's nothing new.) Meds have caused me to have an extremely difficult time with my intelligence, with retrieving words, and my spelling has become frighteningly poor.

I completely understand your fear. Please do try to remain aware that meds definitely affect most people's cognitive skills.