it takes 100,000hits of LSD to kill a mouse. think of how much it would take to kill a human. LSD has never directly killed anyone, its chemical property does not allow it. however, effects of the drug can possibly lead to stupid decisions or suicide..however this is rare. LSD is something that needs to be respected as a substance and used correctly, and then it will be a very enjoyable experience a long with memorable these ppl do not know what they are taking about. you have to remember and if you talk to anyone who has taken LSD, they can tell you, once you take it, you are not the same person, LSD changes the way you think, allows you to see in a completely different way, however you are the same person, you just respect things that You might not have before, such as nature for example, colors and things of that sort. You do have to be careful because LSD is not what it use to be, hardly as pure, so if you get a bad batch you may face a bad trip. if you take way to much you could damage brain cells. over all tho, the chemical LSD has never killed a human being.