Are you on Medicare? Labs are free on that. I couldn't afford it otherwise. It is more expensive than most generic meds on Med D because you can't get it more than a month at a time so it has to be done through a pharmacy. Not all insurers cover it so you have to take what you can get. For me it is $20/month which sucks but it was my only option. You might have better Med D coverage for it; I did the first couple years I was on it and then the last 2 I've not had a lot of options but I have a really good plan overall (better than I had the other years) supplemented by patient assistance for a few meds I need but can't afford.

I hope you can work it out. I know how hard it is. I am on clozapine because nothing else works for me. It sounds like you are in that same position and it is not an easy one to put up with.