Under the Veterinary Feed Directive Final Rule, what were antimicrobial drug companies asked to do regarding production uses?

• A. Expand production uses
• B. Voluntarily withdraw approved production uses such as increased rate of weight gain and improved feed efficiency and change the marketing status from OTC to prescription or VFD
• C. Maintain OTC status
• D. Increase marketing of production uses

Answer: (B)

The main idea being tested is how the Veterinary Feed Directive Final Rule shifted the way production uses of antimicrobial drugs are marketed and used. The rule required that uses like growth promotion and improved feed efficiency, which had been available over the counter, be taken off OTC labeling and placed under veterinary supervision. Drug manufacturers were asked to voluntarily withdraw those production-use claims from their labels and change the marketing status from OTC to prescription or VFD. This ensures that a licensed veterinarian authorizes the use of medicated feeds, promoting more prudent and targeted use of antimicrobials.

This is why the option describing voluntary withdrawal of production uses and reclassifying marketing status best fits. The other choices imply expanding or maintaining OTC access or increasing marketing of production uses, which is contrary to the VFD intent.