No one ever takes pure caffeine in the same kind of quantities as the other drugs, either. A cup of coffee contains like 200 to 300 milligrams of caffeine. There are people who have died from overdosing on caffeine:Vidor wrote:I'm a caffeine addict. Honestly, I have a cup of coffee sitting right in front of me right now, I've had a couple already, and I'll have more later. The reason I'm a caffeine addict is that I've held jobs over the last 15 years or so that have required long irregular hours and impinge on my sleep. (I'm a passenger jet pilot.) (No, not really.) Anyway, didn't drink any coffee in high school and college, started drinking coffee in my twenties, and now, if I don't have coffee tomorrow morning I probably won't feel all that great. In fact, when I was younger I'd marvel at how awful my dad looked in the morning before he had his cup of coffee. One day my little girl will probably think "man, dad is useless until he's had his coffee." Heroin's a lot stronger than coffee.
http://abcnews.go.com/Health/Sleep/brit ... d=12033005
http://www.independent.co.uk/news/uk/ho ... 74964.html