Hi Raco, I had 4 immunotherapytreatments last summer and it is all a fog now. I do remember sleeping a lot and losing weight because of nausea. I found that eating small meals or snacks every 2-4 hours helped overcome the nausea. The good news is that a year later, my melanoma is almost gone – just one small spot on my spleen that we are watching. Good luck with your treatment!