The main purpose of the Modern Authentication of Pharmaceuticals Act of 2025 is to improve the way controlled substances are verified and authenticated within the pharmaceutical distribution system. This aims to enhance safety and security in the supply chain, helping to prevent counterfeit drugs from reaching consumers. Key provisions of the Act include the requirement for a physical chemical identifier to be included on each dose of certain controlled substances. Specifically, this applies to solid oral dosage forms manufactured five years after the Act is enacted.