In November 2009, the Food and Drug Administration (FDA) asked the companies manufacturing 4 Loco to prove these drinks were safe. Safety was not demonstrated and all but 4 companies ceased production. In November 2010, the FDA told the companies to stop making the drinks and the Alcohol and Tobacco Tax and Trade Bureau made their interstate sale illegal.
On December 13, 2010, the last 4 Loco drink was sold. The company trucked the warehouse supply to a company to extract the alcohol and sell it as an auto fuel additive.
In the end, the FDA did its job, protecting the public from a dangerous product. Of course, you can still mix up a rum and coke. But if you do so, be careful, and set a safe and sensible limit in advance.
More Answers from Arthur Perry, MD