The psychiatrist David Healy wrote an awesome, but poorly titled book called Pharmageddon just on this point. By some estimates up to 500K people a year are kil

The psychiatrist David Healy wrote an awesome, but poorly titled book called Pharmageddon just on this point. By some estimates up to 500K people a year are killed due to bad interaction with the medical system. Per a Johns Hopkins report they estimate around 180K. Its worth noting this is not just medical errors which are incredibly frequent, but much of it is due to side effects of correctly prescribed drugs.