i don't know about that, i guess it's possible... i seem to remember hearing that apples of all sorts would do the trick, like you could eat applesauce or just plain old apples. here is a link to a very interesting (IMHO) thread about an experiment with Gallstones in mice using garlic and onions. (thanks to original poster!) also, do the flushes make you feel ill? i almost never feel ill during a flush except when i don't get any stones out. when that happens i always feel very very ill. not sure if that's happening to you or not, but i take it to mean (in my instance) that a large stone (or stones) is preventing success, so i think softening them with whatever works is the answer. hope you get it sorted out... good luck!
here's the link to the experiment: