In a statement, the commission repeated a claim made first in October that the drug has been "linked to at least 37 deaths in the UK and Ireland alone."
"Young people should not be fooled. These drugs are harmful," said the commissioner.
The commission statement also claimed that a scientific risk assessment carried out by the Lisbon-based European Monitoring Centre on Drugs and Drug Addiction (EMCDDA i) "showed that mephedrone can cause acute health problems and lead to dependency."
However, as EUobserver reported in October, the EMCDDA document said that no direct causal link can be made between the drug and any deaths and actually warned against prohibition.
Of the 37, there are only two reported fatalities in which meow meow appears to be the sole cause of death - one in Sweden and one in the United Kingdom. As for the rest: "In some of these cases it is likely that other drugs and/or other medical conditions or trauma may have contributed to or been responsible for death."
"The inquests into the deaths are pending for the majority of these cases therefore it is not possible at this time to determine the contribution of mephedrone," the report goes on.
The commission did not want to be drawn on how many deaths in Europe there were where alcohol, tobacco, or caffeine "appear to be the sole cause of death."
However, according to the commission's own data, harmful alcohol consumption is estimated to be responsible for approximately 195,000 deaths a year in the EU, while smoking kills 1.2 million in Europe annually.
