Which label component is used to identify the medication by the national standard code (NDC)?

• A. NDC
• B. BUD
• C. Sig code
• D. Rx number

Answer: (A)

The label component used to identify the medication by the national standard code is the NDC itself. The National Drug Code is a unique, standardized identifier assigned to each US drug product, showing who makes it (labeler), what the product is (drug and strength/form), and the packaging (package size). This code allows systems to precisely identify the exact medication for dispensing, inventory, and reimbursement.

Other label elements serve different purposes: the beyond-use date indicates how long the product remains usable after opening or preparation; the sig code provides the directions for use; and the Rx number is an internal prescription identifier that tracks the order but doesn’t identify the medication itself.