My experience with invega (which is rerally still early to predict)isconstant headaches as well tiredness as it is a slow release medication .My therapist gave it to me as a substitute for Risperedal which I was on for along time off/on, and eventully I became frustrated with it. I experienced major paranoia where I started to believe that Risperedal was dissolving my true character of survival through the illness. I started to feel that I had no control of my life when I needed it the most for defense. Thanking you profoundly for your response and please take care hope to chat again.