The line between being generally anaesthetised and being dead is quite narrow. (That's why about 1 person in 10,000 who has an operation never comes out of the anaesthetic.) So it is certainly possible to die that way. I doubt that you could persuade a trained anaesthetist to make a mistake. So that means you would have to do it yourself. The main difficulty would probably be obtaining the necessary anaesthetic, and my guess is that it would be a big difficulty. If you can obtain it, information on dosage is presumably available online. Most anaesthetics are administered by injection, so you would have to be willing to do that to yourself.