HI So sorry to hear about what your mother is going through, it seems the side effects are having an effect on your mother, it was same on my wife, Do you know what your Moms CEA count is? she should be having blood work and the Cea is a marker to see what the cancer is doing in her body. You can ask to see blood work reports, so I would ask for them and ask about her CEA count is. in a person with out cancer it is ...1--3 ... if not sure google it ...CEA AND CANCER..
It is so important to be proactive in your Moms treatment,, you can get a second opinion, so if not happy go for that as after all IT IS YOUR MOMS HEALTH .. and thats important...
Also check out on google ...Milk Thistle ... good for liver ...
Does your Mom take a good Multi VitImin?? make sure she drinks lots and lots of water .... and plenty of veg and fruits all good cancer fighters... google ....CANCER FIGHTING FOODS....
Keep her positive and take one day at a time and never give up, thousands on same journey and we are all with you and Mom ...
God Bless You Both ...............Rob