When I was younger, I had three or four big, strong cups of coffee every day. As I've gotten older, my adrenals don't fare well at that. Coffee seems to be a way of borrowing energy from the future, and, for me, the bill comes due a couple of times a year. Even drinking only one cup a day, in the morning, I crash bad for a week, and usually stop coffee for a month or so before I can't stand it any more and start the cycle over again.

Coffee withdrawal for me is three days of misery: low energy and a dull headache in the middle of the forehead, then another three or four days of improving energy, until I'm weaned completely in a week.