He sounds like what I went through. I also refused a PEG and dropped over 60 lbs as a consequence. I also went into a depression during a several month period following treatment (which is pretty much SOP). It took me nearly a year and a half to get back to 80% of what I was physically after treatment. I'm still working on the last 2% 25 months out. And yes, it's pretty much predictable what he is going through. The meds can make one delusional and confrontational at times - try not letting it get to you - it's not personal.

I really didn't want much company when I was bottoming out. It took a while until I would let people see me that way, besides it hurt to talk.

Progress in the post Tx for several months is measured in three week increments. Recovery is a very slow process.

He can try Carnation Instant Breakfast and milkshakes as well - that helped me to keep some weight on (I personally HATED the taste of Boost & Ensure).