Are Andrews Liver salts bile salts?

I am advised to take bile salts before meals since I had my gallbladder removed 18 months ago and still experience an occasional "attack". I have Andrews liver salts from a friend and they seem to stop the attack, but I am unsure if they are also the same thing as bile salts which are recommended to take before a meal to prevent attacks. Anyone know if Andrews "liver"salts are the same as "bile"salts? Are they just the cure of pain during attack or are they the remedy for the problem that causes attacks?