There are many treatments to clear the gallbladder.
Vegetarians or people not eating enough fatty meats typically develop painful gall stones & get their gall bladder removed. The gallblader will fill up with junk & stones if not used. One reason that I like to take 3 tablespoons of coconut oil each day & olive oil in my salads - to keep my gall bladder active... also bacon.
The old saying, if you don't use it you will lose it really applies to the gall bladder. The gall bladder squirts bile into our intestines to dissolve fat. There are many gall bladder flushes to be found in a google search.