I started flushing because of allergies. I've only done 2 so far, and have passed about 300-350 stones total. Each time, the day after the flush my allergies would seem better, but then revert back in the next couple of days.
One of the things that has been really helpful is taking N-acetylcysteine. (NAC) It is an antioxidant that helps liver fuction among other things. While I intend to continue flushing, I've gotten more immediate results from the NAC. It is also possible that the NAC is helping me get better results from the flush.
Also, if you have allergies to ragweed, do NOT take milk thistle. I stated taking it, and was feeling so much worse, and when I found out it is related to ragweed and stopped taking it, I felt better immediately.