This article from the News-Press (a Florida newspaper) warns about the dangers of caffeine pills which might contain as much as 180 mg of caffeine -- as much as is found in one cup of strong coffee.

Caffeine is not regulated by the FDA. It's classified as GRAS (Generally Regarded as Safe), although numerous studies have attempted to link caffeine with some malady or illness. It's even okay in pregnancy, though as ever, pregnant women are advised to see their doctor before ingesting anything that might have caffeine in it.

Now FDA is pushing for more stringent rules on labeling of caffeine-containing food products. And as we all know, it's only a short step from there to totality...