Tylenol aka paracetamol. Take one every six hours, as directed, and you'll be fine. Take two every six hours and you die painfully over the course of the next m

Tylenol aka paracetamol. Take one every six hours, as directed, and you'll be fine. Take two every six hours and you die painfully over the course of the next month. 500 deaths a year in the US alone... despite basically every house in the developed world having a bottle of it in a drawer. And it doesn't even have huge black warning labels with skulls and poison symbols! Street-quality Tylenol would kill people the way street-quality fentanyl does. Probably more.