Anyone else experience a cortisone flare after an injection before? I received a shot last Thursday in my right shoulder and the last 4 days have been miserable. It's still not back to where it was BEFORE I got the shot. Riverside will be here in days and I'm starting to sweat it. I'm told that a Prednisone pack should help b/c the Naproxen and Acetaminophen have been woefully inadequate.