Data Sources
PillSeek is built on authoritative, government-maintained databases. We do not create or infer drug information — everything displayed comes directly from these sources.
FDA National Drug Code (NDC) Directory
Source: fda.gov/drugs/drug-approvals-and-databases/national-drug-code-directory
The FDA NDC Directory is the official registry of all drugs manufactured, prepared, propagated, compounded, or processed for commercial distribution in the United States. It contains drug names, NDC codes, dosage forms, routes of administration, and labeler information.
DailyMed
Source: dailymed.nlm.nih.gov
DailyMed is the official provider of FDA label information (package inserts). It is maintained by the U.S. National Library of Medicine and contains structured product labeling (SPL) data, including imprint codes, pill color, shape, size, and ingredient information — exactly as submitted to the FDA.
RxNorm
Source: nlm.nih.gov/research/umls/rxnorm
RxNorm provides a normalized drug naming system for clinical drugs. It links names of drugs to many of the drug vocabularies commonly used in pharmacy management and drug interaction software. RxCUI identifiers displayed on PillSeek come from RxNorm.
Data Update Policy
Our database is synchronized from FDA and DailyMed sources on a periodic basis. While we aim to keep data current, there may be a delay between FDA updates and our database. For the most authoritative and up-to-date drug information, always refer directly to DailyMed or consult a licensed pharmacist.