I've been somewhat forgetful since my late 30s, but it got worse when I went on meds for my BP. I think part of it is due to meds (especially Lamictal---I'm on a buttload of that) and the rest of it is due to brain damage due to repeated episodes. I can't concentrate on books, forget conversations even in the middle of one (and am mortified when it's pointed out to me), and have to write absolutely EVERYTHING down. It's so frustrating!