As long as one stays on it, does any antipsychotic medication work for psychosis? My progress fluctuates because of my "desire" to "try something different". I would find a combination of medication that was working for me, and then I would sabotage it - without realizing this - by changing my regimen with my doctor's approval. I am on 30mg Olanzapine and 30mg Lexapro right now. I have been on this exact regimen for about three months. But only recently did I start taking my Lexapro as directed. That is, either in the morning or whenever I wake up.