Hey, the United States lets you be on lots of drugs that you shouldn't drive while taking. Why is pot off the list? (although, I'm quite against it's being smoked, it can be used in other ways just as well)
As always- None of my statements are evaluated by the FDA.
My advice is not intended to diagnose, treat, cure or prevent any diseases unless prescribed by a health practitioner. All information is provided for educational purposes only and should not replace the advice of your medical doctor.
(but your medical doctor will probably end up killing you