This topic comes up a lot so I started a thread based on experiance and research to help. I got so worried about all the cortizone shots she was getting to make her stop itching and when I found out there are some terrible side effects after long term use, I decided to do something about it and Jazzie is now free of itching, cortizone & over the counter meds except for spring. And even then its only controlled with the over the counter meds.
Here it is:
http://www.yorkietalk.com/forums/showthread.php?t=43979
I hope you try it and let us know if it helped. Good luck.