Caffeine is a mild psycho stimulant, and despite basic and clinical evidence that caffeine is reinforcing (use leads to tolerance and mild withdrawal symptoms), it is rarely considered a drug of abuse (Franklin et al., 2013). However, mixing caffeine with alcohol is a public health concern (Norberg et al., 2021) with consumption of caffeine and alcohol together or in close approximation, associated with drinking for longer periods of time, consuming more alcoholic drinks, feeling more intoxicated, and experiencing more adverse alcohol-related consequences than when alcohol has been consumed on its own (see Norberg et al., 2021). Public health professionals in Western countries have long warned of the danger of mixing energy drinks with alcohol (e.g., Arria and O’Brien, 2011), believing that higher concentrations of alcohol can be consumed because of caffeine’s masking of the sedative effects of alcohol.