Probably the least diluted source of pharmaceutical-grade caffeine available to those of us who can't prescribe things. Each NoDoz contains 200 milligrams of USP caffeine, which can be easily extracted in the comfort of your own evil basement laboratory for use in concoctions like Liquid Productivity. Generic NoDoz is available for about half the price at large drugstores like Walgreens or CVS, making the acquisition of all that caffeine fairly economical for broke teenagers. Can also be snorted if you swing that way, but that tends to hurt and do little besides impressing foolish youth.