What is SSRI and SNRI stand for? Okay let me tell you my story. I began with Invega and then experienced ED so I asked my doc to refer me to something else (Geodon) and I been woth it for a year or so but no relief I was still having ED it was just a couple of days ago out of sheer anguish I got up and decided to make another change> so I have yet to meet with the doc and I think my problem relates to prolactin in the system so at this point I dont know how to fight this other than changing the antipsychotic for the third time in a row.