Which act regulates drugs that have the potential to be addictive?

The Controlled Substances Act is the correct choice because this legislation specifically addresses the regulation of drugs that have the potential for addiction and abuse. It classifies substances into schedules based on their potential for abuse, their accepted medical uses, and their safety or dependence liability. This act provides a framework for the legal control, distribution, and use of these substances in both medical and research settings.

The other acts mentioned do not focus on the regulation of addictive drugs. The Animal Welfare Act primarily concerns the humane treatment of animals in research and exhibition, while the Food, Drug, and Cosmetic Act regulates the safety and efficacy of food products, drugs, and cosmetics, but does not specifically address the addictive potential of drugs. The Laboratory Animal Welfare Act, which stems from the Animal Welfare Act, also deals with the humane care of animals in research but does not regulate drugs. Thus, the Controlled Substances Act is unique in its specific focus on substances with potential for addiction.