Have YOU ever had too much caffiene?

I guess I am just immune to the effects of caffiene in coffee, oh well as i don't use it to wake up, i use it for the taste. Oh and caffienedoes have some excellent uses, check your excedrin migraine tablets, it has caffiene and why? The caffiene will get the medicine into your system faster. In fact most medicines have a trace amount of caffiene no only to get the medicine in your system faster but as a binding agent.