It seems we suffer from the same mental disorder, because I take almost the same medication. Lexapro is considered a top medicine, however it has some side effects; according to my doctor, side effects tend to disappear with use and just the benefits are kept. And it did happen. I do not take Anbien for insomnia. Usually, just antipsychotics (which I had taken also) interfere with your concentration abilities, and even so just for a few days, till your brain get used to and, as said above, keep just the benefits.