In fact, alcohol was found to be the deadliest drug on an individual level, at least when it comes to the likelihood of a person dying due to consuming a lethal dose. Heroin and cocaine were the next most deadly substances, followed by tobacco, ecstasy, and meth. Trailing up the rear was marijuana.

According to the team of international researchers behind the study, published in the journal 'Scientific Reports,' the findings suggest that marijuana risks – at least those related to mortality – are trumped when compared to substances like alcohol.

"The results confirm that the risk of cannabis may have been overestimated in the past," the report reads. "At least for the endpoint of mortality, the [margin of exposure] for THC/cannabis in both individual and population-based assessments would be above safety thresholds (e.g. 100 for data based on animal experiments). In contrast, the risk of alcohol may have been commonly underestimated."

As reported by the Washington Post, the study's results aren't exactly new, though they do confirm similar findings first reported a decade ago. In a separate story last year, the Post noted that Wayne Hall of the World Health Organization said it's nearly impossible for even those who smoke large amounts of cannabis to overdose on the drug.