This happened yesterday:

Oregon, Washington and Vermont sued the makers of 5-Hour Energy on Thursday for allegedly deceptive and misleading advertising, and said similar suits will follow in other states in the coming weeks.
...
In its lawsuit, Oregon said advertising for 5-Hour Energy claimed the drink contained a unique combination of ingredients to boost energy, whereas its only effective ingredient was a concentrated dose of caffeine.

The lawsuit also said consumers had been misled with claims that the drink would not cause them to experience a "crash" like the one that typically follows a caffeine high, and that it had been recommended by doctors.

I've only had a 5-Hour Energy once in my life. I flew on a redeye from Seattle to Maine and didn't sleep a wink. I went right from the Portland International Jetport to a large family reunion full of relatives I hadn't seen in years. I was deliriously tired, and so I risked a few bucks on a bottle of 5-Hour Energy and downed it in the car on the way to the reunion. I have to say it worked—soon after drinking it, I was alert and awake, in a very non-jittery way. And then, almost exactly five hours after I drank it, I fell into one of the hardest, deepest sleeps of my life. Say what you will about all those other claims, but the "5-Hour" part of the advertising was eerily true in my experience.