The widespread use of illegal balloons containing laughing gas among tourists at entertainment venues has prompted police in Bangkok's Chanasongkram Police Station to crack down on vendors selling these balloons on Khao San Road.
Sale of balloons filled with nitrous oxide gas, also known as laughing gas, is illegal. However, vendors on Khao San Road - Bangkok's famous tourist street - are still selling this balloon to tourists. Some of them have set up stands along the street, luring tourists to pay Bt100 to Bt150 for each piece. The cost of a balloon containing laughing gas is only Bt20.