Nicky, I have never taken Pred, so I can't speak to that. But, I have gone through the hair problem you are describing and I was devastated. It was a long time ago, but I had very long healty hair and in no time at all it became so dry it felt like hay and was falling out like crazy. I had to cut it very short and it was so thin from all the fall out, but seemed to stop as fast has it started. It did grow back in, but not quite as full as it was. The only thing my doctor could contribute it to was a sudden rise in my TSH levels. I'm sorry this is happening to you, but it did help getting it cut short so I didn't have to go through that horrible feeling everytime I saw the handfuls of long hair I was losing every day. I really feel for you, but try to take some comfort in knowing it will grow back...easier said then done, I know. Take care and keep us posted.
Big Hugs,
Pat