Four manufacturers of caffeinated alcoholic drinks have an ultimatum from the Food and Drug Administration on Wednesday, giving them 15 days to stop adding caffeine to products or stop selling.
The Dallas Morning News reported the abrupt decision after an incident involving 14-year-old Valeria Rodriguez who died in a car crash after being ejected from a car her boyfriend was driving who police suspect was drinking a "Four Loko".
The ever popular "Four Loko" sold by Phusion Projects said it would stop putting caffeine in the drink reported The New York Times.
Charge Beverages Corp., New Century Brewing Co. and United Brands Company Inc. also received letters warning them about their products.
Although there is minimal research on the effects of caffeine and alcohol, several studies suggest that the combination of these beverages do heighten risky behavior.