geez..you don't really take such drugs, do you? Have you ever tried turkish coffee? A friend of mine is a coffee junkie, but he got a racing heart and felt immensly active after one cup. Something he never felt before and we coded until 4 in the Morning :) hehe However he'll stick to less coffeinated drinks in the future.
Even coffeeine should be used in limited dosasges. So, please don't recommend drugs anymore.