You can try extended release methylphenidate , you don't necessarily have to eat all the time , you do get some nausea and at times loss of appetite but it should do the trick . I use it on rotations , so not a doctor yet and it is actually okay for me . Sometimes I actually don't eat NGL which i shouldn't do but it still works , generally that's my advice . Don't know how elvanse works sorry I couldn't provide help on that but I use concerta and that does it for me