My Daughter, Age 48 Is Taking Toxamfsein (for Cancer) She

My daughter, age 48 is taking Toxamfsein (for Cancer) She has come clean in all her exams & tests just recently She, however, is losing wt. Mainly she doesn't eat or take time to eat. When she does it is very little. She does a lot of excersice--walking. Her bone scan is within normal limits. Does she have anorexia? And if so what can we do to encourage her to seek help?