The National Library of Medicine has enhanced the National Drug Codes in its RxNorm standard clinical drug vocabulary by adding the NDCs of First DataBank, a drug database firm.
NDCs are product identifiers assigned by drug manufacturers and packagers. Each manufacturer of the same type of medication assigns different NDCs and each dosage of each medication has a different number.
The RxNorm vocabulary creates standard names and identifiers (such as Aspirin 325 MG Oral Tablet) for the combinations of ingredients, strengths and dose forms that exist in drugs marketed in the United States, according to the National Library of Medicine.
More information on RxNorm is available here.
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