My brother-in-law is going through chemo and he refuses to eat or drink anything.  He has lost weight and we had to take him back to the hospital twice because he became dehydrated and he had to be forced fed.  When asked by his doctors he lies and says that he eats 3 meals a day.  Is this a part of his chemo treatment that is making him act this way?
Yes, chemotherapy is a big stress on the body and affects the taste buds and general appetite. U might want to give him a lot of fruits and juices with a digestive enzyme syrup to increase the appetite. Try to give him light salted food as well if he feels tired of eating sweet bland food, that mostly happens with patients under such therapy. Hope it was helpful!!