Drugs, Synthetic or Analogue - As enacted, enacts the "Nitrous Oxide Abuse Prevention and Retail Sale Prohibition Act"; makes related changes. - Amends TCA Title 39; Title 57, Chapter 7; Title 63 and Title 67, Chapter 4, Part 10.

HB 1644 prohibits vape shop retailers from selling nitrous oxide (commonly known as "laughing gas") at retail. It directly affects vape shops and their distributors, wholesalers, or importers who sell nitrous oxide as part of their business. The bill imposes escalating civil fines: $500 for a first violation, up to $1,000 for a second violation (with a 30-day license suspension), and up to $1,500 for a third violation (with license revocation), plus additional penalties for manufacturers. The law takes effect July 1, 2026.