This drug works on the central nervous system, and although it can increase your appetite, it can also DEcrease it, so that aside, I think it's worth a try, providing that your doctor thinks it's suitable to take along with your other medication. It used to be used for various types of pain relief, but I know someone who takes it for depression. Side effects are the same - can make you sleepy, have a dry mouth, blurred vision, etc, but since you were offered it in the past, i asume that you could try it now. I'd imagine you'd have to be careful about taking it with the codeine and Stemetil though, so only your doctor could advise.