My husband has had great effects from Dr. Clark's liver cleanse. Though it isn;t specific to the gallbladder the cleanse has calmed down his gallbladder attacks. Since doing the cleanse (about 3 times now) he has not had an attack from his gallbladder.
I did a sorta cleanse. My gallbladder, which is sluggish, was really bothering me so I took some Epsom Salts (1 tablespoon) and about 1/2 an hour later had a fatty meal. I was sick from it, the runs and a bit of nausea (I have a sensative tummy)but was better the next morning. I had a regular bowel movement and passed a gallstone! It was small, but my gallbladder problem went away!