All prescribers of controlled substances must be authorized by the?

All prescribers of controlled substances must be authorized by the DEA, or Drug Enforcement Administration. The DEA is the federal agency responsible for enforcing the controlled substances laws and regulations in the United States. It oversees the registration of practitioners who are legally allowed to prescribe medications classified as controlled substances, ensuring that they comply with federal laws designed to prevent misuse and abuse.

While the FDA (Food and Drug Administration) regulates the approval and safety of medications, it does not issue licenses for prescribers of controlled substances. The PTCB (Pharmacy Technician Certification Board) focuses on certifying pharmacy technicians, while the APhA (American Pharmacists Association) is a professional organization representing pharmacists and doesn't authorize prescribers. Therefore, the correct authority for prescribers of controlled substances is the DEA.