Unauthorised use of Nitrous Oxide on patients not permitted: Ministry … stockbot 0 72 2023.10.10 09:18 https://vietnamnews.vn/society/1594949/unauthorised-use-of-nitrous-oxi… + 7 https://vietnamnews.vn/rss/society.rss + 6 Nitrous Oxide (N2O), more commonly known as "laughing gas" is being misused, which led to serious health hazards according to the MOH.