So sorry your Mom is having a difficult time. Last year I was experiencing loss of appetite due to major surgery and lost a lot of weight. I should mention I didn’t have cancer but spent 7 months in the hospital, 4 of those in ICU and for 6 months I was not able to eat any food but given all my nutrition through a feeding tube. I still had a feeding tube when I came home but was slowly introduced to food, I was working with a dietician and the goal was to get my caloric intake up to 1200 calories a day before they would remove the feeding tube. That was a great incentive but I was very nauseated. At that time my family doctor suggested I try Nabilone which is medical marijuana. It is a product we have in Canada, and is suggested after chemo to enhance appetite and help with nausea. It worked very quickly and I take a low dose. Last month I decided to stop taking it because I have gained weight and feel good. After a week the nausea was back and I lost almost 5 lbs., I had to force myself to eat even a piece of toast. Yesterday I started taking it again and I was able to eat last night. I hope your family is able to find a solution. Don’t give up, as you know it’s not just about the patient but it affects the whole family.