The same thing happened to me. Drinking is the same way. I don't get "drunk" anymore, so I stopped drinking all together. that's the result they want because they "the psychologist" don't want you mixing these things anyway. So theres gotta be something in this injection that would cause it. It's an inhibitor. Our liver metabolizes drugs so that we are able to feel euphoric.Hey guys I took invega sustena, 5 shots and noticed I can’t get High off anything. Does it come back? Like the euphoric feeling.