The Animal Drug Availability Act 1996 (ADAA) is a United States federal law.

The implications of the act include:[1] Antibiotic use was once common practice before the ADAA approved the use of antibacterials in animal feed.

[2] For each of these livestock species the subtherapeutic use is substantially higher: this contributes unnecessarily to possible microbial resistance.

Those quantities preceded the ADAA, so approving veterinary feed including antibiotics for market contributed to progressing livestock medication.

The World Health Organization states: “Shortly after the licensing and use in livestock of fluoroquinolone, a powerful new class of antimicrobials, fluoroquinolone-resistant Salmonella and Campylobacter isolations from animals, and humans increased.”[4] Most production for fast food incorporates antibiotics, but there has been a push by major companies including McDonald's, Subway and Carl's Jr. to discontinues fluoroquinolone use in associated feedlots.