Kush_closeAccording to a study published earlier this year, marijuana tourism in Colorado–that is, people travelling to Colorado to use marijuana–is leading to more emergency room visits in the state.

The study’s authors write in the New England Journal of Medicine,

At our institution, the rate of ED [Emergency Department] visits possibly related to cannabis use among out-of-state residents doubled from 85 per 10,000 visits in 2013 to 168 per 10,000 visits in 2014, which was the first year of retail marijuana sales (rate ratio, 1.98; P=0.001).

The study’s findings correspond with other reports related to marijuana use. For example:

As we keep saying, marijuana may be many things, but “harmless” simply is not one of them.