Yeah, I would say opiates, besides alcohol, are the only drugs that make me hungry, even weed doesn't. Actually enjoying some Oxy right now, and I've had half a Little Caesars pizza, 2 Nathan's hot dogs (best in the world, hands down) and one of those personal Kraft Mac & Cheese bowls.
About to crack open a bag of sour worms and a Peppered Beef Jerky pack.
Also, another great side effect with Oxy is how good it feels to lay down under a big warm blanket. Also recently picked up these $40 (EACH!) pillows from Kohls that are more comfortable than most beds I've slept on.