A Pre-INN (proposed International Nonproprietary Name) is the proposed, still provisional version of an INN issued by the World Health Organization (WHO). The Pre-INN is published to allow stakeholders (e.g., regulatory authorities, companies, healthcare professionals) to identify potential conflicts and provide feedback before the name is finalized as an INN.
What is the purpose of a Pre-INN?
International Nonproprietary Names are intended to designate active substances globally in a unique, language-independent, and manufacturer-neutral manner. The Pre-INN serves as an intermediate step in the naming process: it creates transparency and reduces the risk that a subsequently finalized name will be confused with existing names (brand names, substance names, similarities in spelling/pronunciation).
Classification within the INN process
In simplified terms, INN assignment proceeds in several phases:
- Proposal of a name according to INN rules (including use of stems for substance classes).
- Publication as Pre-INN with an objection/comment period.
- Evaluation of objections (e.g., risk of confusion, existing rights, linguistic issues).
- Finalization and publication as INN (final international nonproprietary name).
Practical relevance for pharma and regulatory affairs
For companies, the Pre-INN is particularly relevant in early development phases and in the context of global regulatory strategy. The name can impact:
- Documents (CTD, study protocol, labeling, draft SmPC/product information),
- Supply chain artifacts (specifications, CoA templates),
- Pharmacovigilance (case processing, databases, signal detection), and
- Communication (publications, congresses, Investigator’s Brochure).
However, it should be noted that as long as only a Pre-INN exists, changes may still occur—therefore, systems and documents should be designed to be change-resilient.
Distinction: Pre-INN vs. INN vs. brand name
- Pre-INN: proposed, provisional nonproprietary name.
- INN: final international nonproprietary name (generic substance name).
- Brand name: product-specific trade name of a company (may vary by country).
FAQ
Is a Pre-INN already “official”?
Yes—in the sense of an official WHO publication as a proposal. However, it is not final and may be modified following the comment period.
Can a Pre-INN still change?
Yes. Changes are possible if, for example, objections regarding risk of confusion or regulatory/trademark conflicts are raised and accepted.
Why should the Pre-INN be incorporated into systems early?
It supports consistency across teams (CMC, Clinical, PV, Regulatory). It is important to simultaneously establish processes to enable targeted migration when the INN is finalized.