I am taking a low dose (half a 2.5mg pill) nightly of olanzapine (generic zyprexa) as an adjunct to lexapro and klonopin for anxiety and depression for a couple of weeks thus far. It helps a bit with sleep and maybe anxiety. How long are drugs like olanzapine used to supplement the antidepressant, is it a matter of weeks until the condition is improved and then the olanzapine is removed or is it supposed to be used forever in that combination. Note that I am neither bipolor nor psychotic.