Stimulant drinks such as Red Bull should carry clear label warnings on the need for caution when mixing them with alcohol, according to a report published last week.
Young people who consume several cans in one session, often combined with alcohol, could be risking their health, it says. It also advises that such drinks should not be used as thirst quenchers by people taking part in sport.
The report was prepared by the Food Safety Promotion Board in the Irish Republic, following the sudden death of an 18-year-old student, who had drunk three cans of Red Bull during a basketball tournament in Dublin.
An inquest found no evidence that the drink was responsible, but recommended that an investigation be carried out.
The report by the Food Safety Promotion Board - whose investigation covered Red Bull, Absolute Bull, Jolt Cola and Shark - found 56 per cent of those using stimulant drinks on a regular basis mixed them with alcohol.
The board's chief executive, Martin Higgins, warned: "Caution should be exercised when consuming stimulant drinks with alcohol, and the best advice is not to mix them."
Filip Good, of Red Bull Ireland, said the drink already had a label stating caffeine levels and advising against consumption by diabetics, children or those sensitive to caffeine.
"The consumption of alcohol with caffeinated drinks is a broad issue that we would be pleased to discuss with the appropriate Irish authorities," he added.