Lexapro only came out in 2003(-ish). I think "escitalopram" is the scientific name for it. It's confusing because the generics seem to be named by the scientific names. Generics for Zoloft & Paxil only came out in the last maybe....two years (hmmm and maybe Celexa around the same time, as they were all patented around the same time >15 years ago.) Lexapro patent runs until March 2012.