... note that the article linked from this discussion https://news.ycombinator.com/item?id=46168057 https://news.ycombinator.com/item?id=46168057 mentions inter

... note that the article linked from this discussion https://news.ycombinator.com/item?id=46168057 https://news.ycombinator.com/item?id=46168057 mentions intermittent hypoxia as a rapid acting treatment for depression right up there with Ketamine and ECT