Question about relaxation drinks?

Question about relaxation drinks?
I've had/seen my share of the relaxation drinks and every single one of them has put me to sleep. The 1st one I had was Marley's Mellow Mood and I had NO IDEA of the actual side effects. it says MAY CAUSE DROWSINESS...no it DOES cause drowsiness. And you should NEVER operate a vehicle after drinking those. They all contain melatonin which is a hormone that everyones' bodies already create to make you sleep. It's the governments way of making money, distributing something that is suppose to have the effects of Weed. So they are not safe, but I don't know about bad. I do know someone who has a hormone imbalance and things like this can either keep him up for days, or make him sleep for days, and in both instances make your VERY sick.
So I recently saw a report on the news about relaxation drinks and how they're becoming a fad. I think they sound very interesting but some sound very dangerous. So I was wondering are there any that are effective at least somewhat and safe? Or are they all bad? Which are the worst??
Thanks!

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