As we have previously noted , marijuana is the USA 's fastest growing industry and it shows no sign of slowing . However , besides the strain it puts on electricity , another downside has emerged , as people visiting Colorado , one of the four US states where marijuana is legal , are filling emergency rooms having smoked or consumed too much weed . According to new statistics , twice as many out - of - state visitors have woken up in the emergency room with marijuana - related symptoms compared to 40 years earlier . Side effects of cannabis can include nausea , anxiety , high blood pressure , heart palpitations and vomiting . Researchers predict that other states where marijuana is legal are experiencing similar spikes in emergency room visits .
As we have previously noted, marijuana is the USA's fastest growing industry and it shows no sign of slowing. However, besides the strain it puts on electricity, another downside has emerged, as people visiting Colorado, one of the four US states where marijuana is legal, are filling emergency rooms having smoked or consumed too much weed. According to new research, twice as many out-of-state visitors have ended up in the emergency room with marijuana-related symptoms compared to two years earlier. Side effects of cannabis can include hallucinations, anxiety, high blood pressure, heart palpitations and vomiting. Researchers predict that other states where marijuana is legal are experiencing similar spikes in emergency room visits.