Hi Wrotek3,
Thanks for your explanation. I found your article very useful and I would say recently when I met with an accident doctor told me not to drink coffee. I was quite confused that time and was not sure why they are not allowing me to drink. but now i understood whey they told me.
As far as i think it is depends how habitual you are for your coffee. I am saying it because it happened to other things also, when you are addicted to smoking and you don't find your cigarette you will get irritate.