Gallbladder Flush?
 

Has anyone had any experience of the above. Relative about to undergo surgery, but isn't keen.

Thanks in advance!

I presume you're talking about the sort of thing offered on various pseudo-medical websites. Wouldn't touch it with a bargepole. I assume your relative is about to undergo an op. for gallstones. The surgery, while not minor, is very safe. However, when I had mine, they struck a situation which, had I done a gallbladder flush, would have killed me. With the op, they were able to handle it with no problems.