i was on the invega sustenna shot for a long time. the shot is very expensive like you said. do you have insurance that can pay for some of it?? i found that the shot would wear out before the month was up and my symptoms would re-emerge again. i would have to take oral invega to get me through that time. i also developed these hard lumps under my skin on my arms and hips where the injection was given to me. but in the end, it did greatly improve my symptoms. i was put on the injection because i was not med compliant and it solved that problem pretty well, lol