@candytoo I did some reading in the scientific literature. Just a caution that we are not medical professionals here on Mayo Clinic Connect. We can provide you with support and suggestions for how to advocate for yourself but not actual medical advice. We also share our own experiences as I did when I shared that an older antidepressant I took in the past (Norpramin) helped me with depression and anxiety but at a higher dose I had some word finding problems. Those word finding problems were temporary and totally went away when the dosage was reduced. Escitalopram is an SSRI and so its mechanism is entirely different than the Norpramin I took in the 1990's. What I found when I was reading is that in older individuals (over the age of 60) escitalopram helped their depression and anxiety and there were no changes in cognition including memory and attention. Like @gingerw I'd go with what reputable sites like Mayo Clinic says. I would also take with caution what a pharmacist tells you as they are not your physician.

Have you talked with your doctor again about the prescription?