As of yesterday I'm off Zyprexa. I was on 25 mg and I tapered off slowly during about half a year. I was mostly afraid my insomnia would return - it did a little, but not much, and during the last few steps I was already on Clozapine (Clozaril) which is also sedating.
I think pdoc attributed some of my increased PTSD symptoms to the decrease in dosage.