He's also fighting with his Nazi bot and supposedly sleeps with a firearm handy. Honestly, odds are pretty good.

Who doesn't like going for a swim when the K kicks in?

But is Elon alone at any time? He travels with a very tight security detail. I am willing to bet there is always someone around him almost all the time, meaning if he does take a good hit of ketamine and the tiles on his bathroom won't slow down he won't drown. Someone will come to his aid.