Most people here will say that 2-3 weeks post tx was the worst and I agree. It seems to be the norm. I'm 3 months post tx and I am just starting to eat solids at supper time. My taste buds are just starting to be a little normal. I still have very little saliva. My neck, tongue, and jaw are actually still tightening. What he is going through seems fairly normal, but you need to be sure to keep your dr.s informed of his condition. With throwing up comes malnutrition and dehydration and with open soars and bleeding comes infections. Make sure the doc's know and let him know there is a light at the end of the tunnel. It will be real tough then he'll feel a tiny bit better and his spirits will come up. I had a second tough time after the first one but I attribute that to withdrawals from the pain meds. Just hang in there and keep him hydrated. He may at some point need fluids if all this persists. Good Luck