Which agency primarily monitors the classification and regulation of drugs such as ephedrine in New Mexico?

The Board of Pharmacy is the agency that primarily monitors the classification and regulation of drugs such as ephedrine in New Mexico. The Board of Pharmacy is responsible for overseeing the practice of pharmacy within the state, including the regulation of controlled substances. This includes setting the standards for the classification of drugs based on their potential for abuse, medical usage, and safety profile, which is particularly important for substances like ephedrine that have the potential for misuse.

While other agencies have roles related to drug regulation, the Board of Pharmacy specifically governs pharmacy practice and ensures compliance with state laws concerning the handling and dispensing of medications, including ephedrine. The Department of Health may handle broader public health issues but does not regulate pharmacies directly. The Drug Enforcement Administration primarily deals with federal drug enforcement and classifications, whereas the Food and Drug Administration focuses on drug safety, efficacy, and approval processes on a national level, rather than specific state regulation. Therefore, the Board of Pharmacy's dedicated role in regulating pharmacy and controlled substances makes it the correct answer.