[tjohns]

Personally, I've found drinking that much coffee is very likely to give me headaches, and has even given me a couple ocular migraines over the years (not fun). Not to mention making me feel terrible once the caffeine starts to wear off in the evening.

Add in the caffeine withdrawal afterwards, and I've decided that it's best to just avoid caffeine altogether. Overall, I feel like I have more energy now... but it does require being more careful about getting enough sleep.

[wbkang]

Haha for me it's the opposite. Caffeine cures my migraine the same way rizatriptan does. They are both vasoconstrictors and help reduce my throbbing migraine.

[microcolonel]

Now is as good a time as any to remind people that things aren't bad for everyone just because some people are sensitive to them. The hysteria over gluten, generally reasonable amounts of salt, peanuts, etc. in the diets of people who are not sensitive to them always irritated me.

I have to be careful with caffeine personally because I haven't needed to have it for the last few months, so when I do have it, it usually seriously upsets my (unbounded) sleep cycle if I don't take care to go to sleep at a regimented hour.