Anne-Marie, It sounds like your son is in the "just hit the bottom" stage of his treatment. Many of us have "been there-done that". AS a caregiver, this may be where you have to put your "Nurse from Hell" hat on and wade in and get reeaalll tough with him, his Docs.etc. You will need to be very vocal about what is happening at home on a daily basis and what issues need to be addressed. His issues with smell, taste, etc. are real ones,. but the biggest issue is getting nutrition in him. Don't give in if you see him going downhill. Keep pushing. Amy