Personally I'm a fan of marijuana (vaporized not smoked) for nausea and increasing appetite. If it's legal in your state then ask your Dr about it, if it's not it doesn't have any drug interactions so talk to your hippie or stoner buddies and score a bag. It'll help with the depression, pain, anxiety and increase appetite. No matter what your notions are of marijuana many on these forums have used it successfully during treatment to help cope with side effects of other drugs and keep moods lifted. A few hits from the vaporizer, a bag of jevity and Pineapple Express on DVD should be enough to get him in a good mood, if not I recommend doubling the doses of mj, jevity and switching any Cheech & Chong or Harold & Kumar movie for P/E

Keep your chin up!

Eric