My friend couldn't handle the taste of Epsoms and did a successful flush with a heavy dose of simple pharmacy-sold magnesium supplement. The magnesium in it was in chelated form and I think she took about 1 gram worth of Mg. She took it just once, two hours before OO/GJ and followed up with a SWF (Salt-Water-Flush) in the morning. No problems and she did get stones out, intends to continue flushing. I don't know if it is OK to do with acute gallbladder problems.