Graphite symptoms and conditions

I started Prednisone 2 weeks ago and gradually started having leg cramps. They have gotten worse over the last couple of days. They are in my ankles and feet and I have to get up several times a night just to sit until they relax. We plan to decrease the dosage in two weeks, but this is most annoying. Of course, it's far better than what I was experiencing with pain and sleepless nights and had gotten so I could barely move. My hands were swollen and tight, my arms ached with every move and movements were very limited. My bones in my feet felt (and sounded) as though they were shifting around when I got up to walk. My knees were weak. I was just diagnosed with polymyalgia rheumatica. I feel 70-80% improved. Just wondered if anyone else has had these symptoms on Prednisone. It didn't do this with the dosepaks.