Ex partner has been diagnosed with stage 4 renal cancer, kidnesy & very large tumour removed last summer & he has recently started immunotherpay for secondary lunch & lymph node cancer. 

First round of immunotherapy was a breeze, this round has been horrific, resulting in sheer exhaustion, joint pain, constant weakness, nausea, lack of appetite - loss of 1 stone in weight in a week - to the point that they have no wish to eat. Had to be treated for dehydration prior to last round of immunotherapy. 

I'm at my wits end as our youg daughter has just called to say they've pulled over in the car so that they can vomit at the side of the road - having not ate anything since Tuesday night. 

What if anything can I do - this cannot be healthy & any good for treatment, I can't force feed an adult to eat, especially if they cannot stomach food. After the op they were given meal replacement shakes in hospital & couldn't stomach those, so I can't see them willingly drinking them again.