According to Mrs Chang from Sensible Health, when we get nausea or throw up after or while taking the OO+Juice may be an indication that the liver is congested .
She says that the day before the flush we should have light meals (whole food )only in order to give our liver a break, and on the day of the flush only apple juice to help the bile move. Maybe you can try her recipe and see if it works for you.
Visit her site, I am sure you´ll learn some important things.
Good luck