Relating to designating certain substances as Schedule IV controlled substances under the Texas Controlled Substances Act.

HB 1636 designates three specific substances - carisoprodol (a muscle relaxant), mifepristone, and misoprostol - as Schedule IV controlled substances under Texas law. This means these drugs would be regulated similarly to other medications with lower abuse potential than higher-schedule drugs, affecting pharmacies, healthcare providers, and individuals handling them in Texas. The bill amends the Texas Health and Safety Code to add these substances to Schedule IV, effective September 1, 2025, with no retroactive application to offenses committed before that date. It directly impacts how these substances are legally managed within the state’s drug control framework.