Why can a drug’s coded ingredient list disagree with its label text?
A drug label states its inactive ingredients twice: once as a coded list, once in the written text. Of FDA’s six automated checks specific to the coded list, none compares it with the ingredients the text names. A drug’s coded ingredient list and its written label text don’t always agree. Check both lists on the current label.
FDA, SPL Implementation Guide with Validation Procedures, December 2023
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For licensed, certified, or registered healthcare professionals. Supports — does not replace — professional judgment. Not for time-critical use. Review the basis and current FDA label.
Two ingredient lists on one label
The coded list is a structured list of ingredient names filed with the label. It is part of the structured product data in the Structured Product Labeling (SPL) file that FDA receives. In prescription labeling, the written text lists inactive ingredients in the Description section. On an over-the-counter Drug Facts label, they appear under the heading “Inactive ingredients”.
What FDA’s automated checks cover
Of FDA’s six automated checks specific to the coded list, none compares it with the ingredients the text names.
FDA, SPL Implementation Guide with Validation Procedures, December 2023
These checks are part of FDA’s SPL validation procedures.
What a disagreement looks like
One list can name an ingredient that the other list does not.
For example, the written text can name a color additive that the coded list does not include.
See both lists on DailyMed
DailyMed, from the National Library of Medicine, shows each product’s ingredient tables and its label text. Read the product’s inactive ingredient table, then the inactive ingredients its label text names. You can compare the two on the current label with no special tool.
Why the exact product matters
The same drug can carry different excipients by manufacturer and even by strength. Check both lists on the label for the exact product, at its maker and strength. A workup is only as good as the ingredient list under it.
What can the labels show when a patient tolerates one version of a drug but not another? →
What ExciIQ shows
When a drug’s coded ingredient list disagrees with its written label text, ExciIQ shows you the difference side by side, in plain language. Every record carries provenance. ExciIQ keeps its analysis at the level of the specific product in the bottle.
Professional use only — not for patient diagnosis or treatment decisions.