If it works for people, I will be in the line up lol.
Marbles is another option that my vet has mentioned, he is looking into it for more information. She will be checked for cysts as well, before any decision is made. Regumate is not an option at this time. We have used a supplement called Moody Mare before and that sort of helped, but not consistently.

http://standardbredhorses.yuku.com