@klein505
To be more specific, abiraterone Stops the production of cortisol. Without it, you get extreme fatigue. Prednisone restores the cortisol that is lost. For some people 5 mg doesn’t work and they need 10 mg. After you stop abiraterone Your body does not usually produce cortisol immediately. It can take a month or two or three of tapering off before your Cortisol returns completely. I thought mine would return in one month, In the afternoon, I would have extreme fatigue and have to sleep for a while. One month wasn’t enough For me and for most people.