Vinegar may kill rather than cure victims of box jellyfish stings, Queensland researchers have found.
The remedy, used for decades to treat stings, causes up to 60 per cent more venom from the lethal jellyfish to be discharged into the victim.
The findings have prompted calls for the Australian Resuscitation Council (ARC) to revise their sting treatment guidelines.
Research co-author and venom expert Jamie Seymour says the research changed his mind about vinegar.
"I thought I'd be able to show the world why you use vinegar," the James Cook University associate professor told AAP.