Maria, so sorry about Joe's recurrence. Tough to go back on chemo; my husband had to go back on chemo also back in July. Did they test your Joe for HER2; if not, I owuld urge you to ask your oncologist about it. We really thnk the Herceptin is the reason my husband is responding so well this time around.
There's another OTC med for mouth sores that I use for canker sores....it's called Ora Base. It's can be a little hard to find, but I've found it at all types of drug stores. i always keep it in the cupboard for a canker sore outbreak. It numbs (like OraJel for babies) but it's a very think paste that stays in place right on the sores....salive doesn't seem to wash it off, so the relief lasts a couple hours. It's the best thing I've found for my life-long recurrent canker sores.
Weight is a mojor concern with my husband also.I've been making smoothies using Carnation Instant Breakfast. I add milk, some protein powder (1/2 as much as the label states, because if I add more he complains about the taste), some blue agave syrup sweetener (since his esophagectomy sugar causes diarrhea), some bee pollen for energy, a handful of frozen berries and sliced frozen bananas. He actually likes the taste, I can change up the fruits for variety, and it seems to be helping. He can't drink them for a couple days after chemo due to the cold sensitivity from the Cisplatin, but the rest of the time he'll drink them a couple times a day. I haven't tried chocolate flavor yet, but I'm planning to look for some sugar free chocolate at the health food store today. You may have to experiment a little to get a flavor Joe will drink, but it's worth a try!