The US Federal Drug Administration has issued warnings targeting specific drinks in a clampdown on alcoholic beverages with high caffeine content.
The drinks in question are mostly seen in the States and are malt-based and premixed drinks.
The FDA is concerned that the drink’s labelling does not state that adding the caffeine is “generally recognised as safe”.
In some cases, the drinks contained other stimulants alongside caffeine itself.
The FDA website claims that they have data and expert opinion that caffeine can: “…mask sensory cues that people rely on to determine how intoxicated they are.