Question: are celexa and lexapro interchangeable?
Answer: Celexa and Lexapro are both antidepressants in the same class, however, they are not the same. Celexa is a racemic mix of the R-enantiomer and S-enantiomer of citalopram. Lexapro contains only the S-enantiomer, which is the more active isomer responsible for the serotonergic effects.