If my maths is correct, that's just shy of 2g?
I've taken 4g before and not gone to hospital. Slept a lot, really bad leg cramps, felt shit for a couple days then business as usual (ironically it puts my pulse and blood pressure in the "normal" range for a few days when they're usually high).
I think most instances of fatality are a result of much higher doses, though it's possible to die from a lower dose, just unlikely.
There are lots of case studies online. Propranalol has come under fire as it's frequently prescribed off label for things like anxiety and migraines, but people have successfully ctb with it. Only a small number of reported deaths though and little by way of comparative figures of those who attempted and failed.
There are a few topics on the forum about it if you use the search function :)