Hello, I was given 10mg samples of Lexapro from my primary doctor to treat anxiety and since then I have been seeing a psychiatrist who prescribed the Celexa generic, Citaloproam 10mg, to start, eventually moving me up to 20mg. I first really want to know if the two medications are interchangeable, therefore the doses, 10mgs will line up and I won't feel a drastic change from the switch. Thank you very much.~Nicole