What is the primary focus of the DEA in managing controlled substances?

The primary focus of the Drug Enforcement Administration (DEA) in managing controlled substances is to prevent their misuse and ensure safe handling. The DEA's mission encompasses the regulation of substances that have the potential for abuse and addiction. This is critical as controlled substances can pose significant public health risks if misused.

The agency operates under the Controlled Substances Act, which classifies drugs into different schedules based on their potential for abuse, medical use, and safety. By enforcing regulations around prescribing, distributing, and disposing of these substances, the DEA aims to minimize drug abuse and promote safe practices among healthcare providers and patients.

The other options reflect activities that are not aligned with the core mission of the DEA. Encouraging the use of narcotics contradicts their role in preventing misuse. Similarly, promoting drug sales does not align with their regulatory function, and while supporting drug research may be a part of pharmacy and drug development roles, it is not a primary focus of the DEA, which centers on regulation and enforcement related to controlled substances.