Emergency room visits for French children who ingested a marijuana product doubled between 2004 and 2014, Reuters reports. 

Pediatricians in intensive care units were also starting to see toddlers who had ingested the concentrated marijuana product, Claudet told Reuters Health by email.

She and her colleagues write in the journal Pediatrics that France has the highest level of drug consumption in Europe even though marijuana is illegal in the country.

The most popular version of marijuana or cannabis in France is hashish, a concentrated resin often sold in small olive-shaped pellets.

The researchers analyzed data collected from 2004 to 2014 on children under age 6 who were admitted to 24 pediatric emergency departments.

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