Recreational cannabis use is now legal in 24 U.S. states. After Illinois legalized it, in 2020, James Swartz started to keep an eye out for any changes in public health that might stem from more widespread marijuana use. A professor of social work at the University of Chicago, he still remembers when he and his colleagues learned about the rise of a distressing condition that seemed linked to chronic marijuana usage. “We started seeing more and more clinical reports and case studies in the literature about this syndrome,” he says. “So we were curious: Is that happening here?”
They found that indeed, cannabinoid hyperemesis syndrome…
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