defined daily dose
- Guideline or reference source
- WHO Glossary
- Definition
- The defined daily dose is a unit of measurement defined as the assumed average maintenance dose per day for a pharmaceutical used for its main indication in the adult. A DDD will normally not be assigned for a substance before a product is approved and marketed in at least one country. The basic principle is to assign only one DDD per route of administration within an ATC code. The DDD for plain substances are normally based on monotherapy. Doses for individual patients and patients groups will often differ from the DDD. DDD does not necessarily reflect the recommended or Prescribed Daily Dose. DDDs are not established for topical products, sera, vaccines, antineoplastic agents, allergen extracts, general and local anaesthetics and contrast media.
- Abbreviation for
- DDD
- Related Term
- fixed dose combination
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