The New York Times reports that the FDA is threatening to ban drinks containing both alcohol and caffeine:

Top federal food regulators threatened on Friday to ban caffeinated alcoholic drinks unless their makers quickly proved that the beverages were safe.

In a statement, the Food and Drug Administration said it told nearly 30 manufacturers of the drinks that unless they could provide clear evidence of safety, the agency would “take appropriate action to ensure that the products are removed from the marketplace.” Officials did not say how long such a determination might take.

One wonders if they will take this to its logical conclusion and ban rum & cokes as well.