UMC's WHODrug documentation library is the principal reference for organisations using WHODrug for medicinal-product coding.
Core official resources
- WHODrug documentation — user guides, coding guidance, developments, supplementary documents, file descriptions and version verification.
- WHODrug coding guidance — current best practices and C3 coding guidance.
- WHODrug Best Practices — current best-practice document.
- C3 guidelines — guidance for coding with the C3 format.
Important distinction
UMC explicitly describes the C3 coding guidance as coding best practice rather than a regulatory requirement. Organisations should therefore distinguish dictionary conventions from jurisdiction-specific submission rules and maintain documented internal coding conventions where operational decisions are required.