[pasbesoin]

I was responding specifically to nikblack's comment about finding it more effective than caffeine when hacking. I didn't mean to imply it's all puppies and daisies.

Amongst other things, nicotine's a vasoconstrictor. Long term exposure may not be the best thing for one's cardiovascular system, even leaving out the tar, volatiles, and plutonium that come with tobacco smoke.

Then there's the whole dance it performs with neurotransmitters and multiple addictive centers in the brain. I recall some researchers speculating that it may be so addictive at least in part because it activates multiple centers associated with addiction, whereas most drugs only activate one or another of those centers.