Hi girls,
would like to share my experience as well...
when i first started drinking coffee, i only tried Nescafe. And without fail, a headache will follow.
At times, when i drink other brands like starbucks, etc, occasionally, do get a headache followed by a neausea feeling. so i presume at that time, that i cannot take 'strong' coffee.
However, sometime later, (becos of work) i started drinking coffee again. This time no no nescafe for me. I had the kopi-o from my canteen and suprisingly, i like it very much and no headache...
as i drank more,everyday, i would get a headache if i dun drink...
so the conclusion i drew is you've got to switch brand to try if you are sensitive to some ingredients in that brand( like i am to nescafe).
Soon, you'll love coffee and cannot live without it(like i am now)
At times, when i drink more cups per day without my regular plain water, i'll get the heart palpitation symtoms as well. so i think its really becos of dehydration.