A list of herbs used for health conditions can be considered an early forerunner to the FDA approved drug list. What is this list called?

The correct choice is the term "Pharmacopeia." This refers to an authoritative book or a compilation that includes a list of medicinal drugs and their effects, as well as information on their preparation and dosage. Historically, pharmacopoeias have been vital in providing guidance on standard treatments and ingredients of drugs, serving as a foundational reference in pharmacy and medicine. It provides clinicians, pharmacists, and researchers with clear and standardized information about various substances used for health purposes.

In contrast, "Panacea" refers to a solution or remedy for all difficulties or diseases but does not pertain to a formal list of health remedies. "Pharmacology" is the branch of medicine that focuses on the study of drugs, their effects, and their uses but does not specifically denote a list or compilation. The term "Pharmaceutical" generally relates to the production and sale of medicinal drugs but does not specifically refer to a historical listing like the pharmacopoeia does. Thus, the concept of a pharmacopeia aligns perfectly with the definition of a structured listing of herbs and other substances used for treating health conditions, making it the most relevant choice.