This is very interesting information, though I am very sad for what they did to these rats in order to get this. These lethal doses for a rat are often nearly impossible to obtain for a person. Water is an interesting example- at fraternity hazing parties in college some people have, very sadly, died from overdoses of water put into a beer bong- but it would be nearly impossible to do this yourself, because you would need to get ingesting water even when you are barely coherent. Ibuprofen and arsenic are right next to each other in this table, but are very different in humans. Ibuprofen is almost impossible t overdose on, but arsenic is fairly easy to overdose on if you can get it, though people say it is one of the most painful methods that there is.