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'''Pharmaceutical codes''' are used in [[medical classification]] to uniquely identify [[medication]]. They may uniquely identify an [[active ingredient]], drug system (including [[inactive ingredient]]s and time-release agents) in general, or a specific pharmaceutical product from a specific manufacturer.

==Examples==

Drug system identifiers (manufacturer-specific including inactive ingredients):
* [[National Drug Code]] (NDC) — administered by [[Food and Drug Administration]].
* [[Drug Identification Number]] (DIN) — administered by [[Health Canada]] under the [[Food and Drugs Act]]
* [[Department of Health (Hong Kong)#Hong Kong Drug Registration|Hong Kong Drug Registration]] — administered by the Pharmaceutical Service of the [[Department of Health (Hong Kong)]]
* [[National Pharmaceutical Product Index]] - South Africa

Hierarchical systems:
* [[Anatomical Therapeutic Chemical Classification System]] (AT, or ATC/DDD) — administered by [[World Health Organization]]
* [[Generic Product Identifier]] (GPI) — [[hierarchical classification]] number published by MediSpan
* [[SNOMED]] — C axis

Ingredients:
* [[Unique Ingredient Identifier]]

Proprietary database identifiers include those assigned by [[First Databank]], [[Micromedex]], [[MediSpan]], Gold Standard Drug Database (published by [[Elsevier]]), and [[Cerner Multum]] MediSource Lexicon; these are cross-indexed by [[RxNorm]], which also assigns a unique identifier (RxCUI) to every combination of active ingredient and dose level.

==See also==
* [[Drug nomenclature]]
* [[Drug class]]


{{Medical classification}}
{{二次利用|date=13 June 2021}}
[[Category:Pharmacological classification systems]]