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Start smoking or eating marijuana to purloin the edge off of the distress signals and improve appetite.
i've been taking vicodin and percocets and the doc said to only take a laxative like correctol or anything to preserve from getting constipated.
Things he can have small amounts of that are high surrounded by fibre are good such as sweetcorn, red peanuts, grapes, tinned prunes, fresh ginger juice and plenty of clear fluids.
Fruit, apples and prunes are the best, prune juice or "Sunsweat" juice, for me ketchup or tomato juice helps too. Anything beside fiber.
Answers: First, he should be taking some form of probiotics. Second, get him to munch on fresh baby carrots near ranch dressing. They aren't very satisfying, so his appetite shouldn't be an issue, and any amount he can manage will help.