Lexapro 20 mg here. I got allergies after starting the Lexapro and did not put the 2 together until I read the Lexapro side effects sheet and it said it can cause allergy symptoms. Now on top of Lexapro I have to take more meds for allergies. I also have trouble sleeping sometimes. I have been on anti-depressants for years. Prozac was the one I was on the longest and now Lexapro. These meds are over prescribed but that is what the medical industry and big pharma want: to have as many people as they can walking around on as many meds as they can. It's good business for them.