House Bill No. by Representative Mack aims to amend the Uniform Controlled Dangerous Substances Law in Louisiana by adding specific substances to Schedule I. The bill introduces two new opiates: N-Desethyl isotonitazene (N-ethyl-2-[(4-isopropoxyphenyl)methyl]-5-nitro-1H-benzimidazole-1-ethanamine) and Etonitazepipne (2-[(4-ethoxyphenyl)methyl]-5-nitro-1-[2-(piperidin-1-yl)ethyl]-1H-benzimidazole) under the opiates category. Additionally, it includes Ethylphenidate as a stimulant substance in Schedule I.

The bill also directs the Louisiana State Law Institute to renumber the new entries to maintain alphabetical order within the schedules. This legislative action reflects an effort to regulate emerging substances that may pose risks to public health and safety.