Mixing alcohol with highly-caffeinated soft drinks can increase the risk of injury on a night out, researchers have warned.
Popular cocktails like vodka and red bull, espresso martinis and jagerbombs, where a shot is dropped into a glass of energy drink, can be more dangerous than drinking alcohol on its own, they said.
This is because the stimulating effect of caffeine can encourage people to stay out longer and drink more overall, according to a review of 13 academic studies into the behaviour.
Researchers at the University of Victoria in Canada said energy drinks can mask the effect of alcohol, so increase the risk of injury through falls, car accidents and bar brawls.
“Usually when you’re drinking alcohol, you get tired and you go home,” said Audra Roemer, the lead author of the study published in the Journal of Studies on Alcohol and Drugs.
“Energy drinks mask that, so people may underestimate how intoxicated they are, end up staying out later, consume more alcohol, and engage in risky behaviour and more hazardous drinking practices.”