Final answer:
The first law to prohibit the interstate distribution of adulterated or misbranded foods and drugs was the Pure Food and Drug Act of 1906, which also led to the establishment of the FDA.
Step-by-step explanation:
The first law that prohibited the interstate distribution of adulterated or misbranded foods and drugs was the Pure Food and Drug Act of 1906. This landmark legislation was enacted following public outcry after exposes on the unsanitary conditions in the food and drug industries. As a result, federal standards of inspection and sanitation were established for meatpackers, and drug makers were required to list ingredients. Notably, this act led to the creation of the Food and Drug Administration (FDA), which is responsible for ensuring the safety and efficacy of food and drugs available to consumers. This law enacted federal standards of inspection and sanitation on meatpackers and required drug makers to list ingredients. It was inspired by muckraking exposés about adulterated foods and dangerous patent medicines.