What is the primary purpose of the DEA Pharmacist's Manual?

The primary purpose of the DEA Pharmacist's Manual is to offer guidance on the requirements and responsibilities of pharmacists. This manual serves as a crucial resource for pharmacists to understand their role in the management of controlled substances, including the legal and ethical obligations they must adhere to when dispensing medications. It outlines the regulations set forth by the DEA and informs pharmacists about how to comply with these laws while ensuring the safe and effective use of controlled substances.

By focusing on responsibilities such as recordkeeping, inventory management, and the handling of prescriptions for controlled substances, the manual provides an essential framework for pharmacists. This guidance is especially important in helping them navigate the complexities of federal and state laws that govern pharmaceutical practices.

The other options do not accurately reflect the main purpose of the manual. Legal definitions of controlled substances are only a part of the content, not the manual's primary focus. It does not function as a marketing tool for pharmaceutical companies, nor is it intended to list all drugs available in the US. Instead, its core mission revolves around equipping pharmacists with the necessary knowledge and understanding to fulfill their professional duties effectively and legally.