For each provision of Chapter 1 of the Creation Guide to function precisely, the words it uses must carry the same meaning for everyone reading them. The distinction between confirmatory and exploratory analysis, the scope of what "pre-specification" covers, the difference between a non-proprietary name and a brand name — when the same term is read with different meanings, even the most carefully worded rule will be applied inconsistently in practice.
Terms are the foundation on which a provision's precision rests. What Chapter 1's rules prohibit or require in any given situation depends on the definitions of the terms they use. The Glossary organizes those definitions in one place, to prevent interpretive drift.
01Why precise definitions are necessary
The language used to govern promotional materials for prescription drugs is a mixture of words borrowed from everyday use and words carrying specialized meanings in scientific or regulatory contexts. "Efficacy" is used as an ordinary word, yet in the context of a clinical trial it takes the restricted meaning of "effect shown on a pre-specified primary endpoint." The prohibition on "emphasizing safety" does not forbid discussing safety at all — it forbids assurance-type language that goes beyond what the evidence supports.
When the underlying meanings of such terms are not shared, people reading the same provision will reach different conclusions about where the boundary lies. The Glossary exists to prevent that variation through structure.
Common patterns where confusion generates misreading
Certain pairs of terms tend to generate confusion in practice. In scientific and statistical language, "confirmatory" and "exploratory" are commonly conflated, and the nominal p-value is repeatedly misused as though it carries the same weight as a confirmatory result. In regulatory language, "approved indication" and "clinical positioning" are sometimes confused, creating the risk that off-label claims are presented as approved information. In the language of expression controls, "emphasis," "assurance," and "misleading" are used loosely, blurring the edges of the provisions that depend on them.
02The three categories of the Glossary
The pages under this chapter organize terms into three categories according to their nature.
Scientific and statistical terms
This category covers the statistical and clinical-trial methodology vocabulary that Chapter 1's provisions rely on. It includes the distinction between confirmatory and exploratory analysis, the requirements for pre-specification, the standing of subgroup analyses, the relationship between meta-analysis and systematic review, and the interpretation of p-values and confidence intervals. When these terms are left undefined, judgments about which data may appear in a material will vary from person to person.
Approval and regulatory terms
This category covers terms that carry specific meanings in the pharmaceutical regulatory context. It includes approved indication, dosage and administration, qualifier language (shibari hyōgen), the electronic package insert, data evaluated during regulatory review, and post-marketing re-examination materials. These words belong to the official record that the Creation Guide references, and they must be understood as distinct from their everyday usage.
Expression-control terms
This category covers the vocabulary used to identify the types of expression the Creation Guide prohibits. It includes false or exaggerated claims, expressions likely to cause misunderstanding, emphasis of efficacy or safety, comparative advertising, and reference information. Understanding the difference between "emphasis" and "clear statement," and the scope of "likely to cause misunderstanding," is essential to applying the provisions accurately.
The Glossary is not a supplementary reference. It is the shared semantic foundation that allows Chapter 1's provisions to function. As long as the same term is being read with different meanings, no amount of specific rules will produce consistent application in practice. The pages in each category are a collection of definitions that exist to secure that consistency.