Data Sources & Attribution

DATA SOURCES & ATTRIBUTION

Last Updated: March 1, 2026

RxSaurus provides drug equivalency, classification, and comparison information derived from publicly available U.S. government databases and regulatory sources. We are committed to transparency regarding the origin of the data displayed on this Site. Below are the primary data sources used by RxSaurus and the required attribution statements.

1. U.S. NATIONAL LIBRARY OF MEDICINE (NLM) — RXNORM

This product uses publicly available data courtesy of the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product.

RxNorm provides normalized names for clinical drugs and links between drug vocabularies commonly used in pharmacy management and drug interaction software. RxSaurus uses RxNorm data to identify drug ingredients, establish relationships between brand-name and generic drugs, map drugs to standardized clinical concepts (RxCUIs), and provide normalized drug naming across the Site.

RxNorm is produced by the U.S. National Library of Medicine (NLM) and is available at https://www.nlm.nih.gov/research/umls/rxnorm/. RxNorm data is updated regularly by NLM. RxSaurus periodically synchronizes with the latest available RxNorm release.

2. U.S. FOOD AND DRUG ADMINISTRATION (FDA) — OPENFDA

RxSaurus uses publicly available data from the openFDA initiative provided by the U.S. Food and Drug Administration (FDA). openFDA provides open access to FDA regulatory data including drug labeling, adverse event reports, and product information. The openFDA data is provided "as is" and the FDA does not endorse or recommend this or any other product or service.

OpenFDA provides access to structured FDA data including drug labeling (SPL/package insert data), adverse event reports (FAERS), drug recall and enforcement data, and National Drug Code (NDC) directory information. RxSaurus uses openFDA data to supplement drug information with FDA-approved labeling details, indications, contraindications, and other regulatory data.

OpenFDA is available at https://open.fda.gov/. Data is provided under the openFDA Terms of Service.

3. FDA ORANGE BOOK — APPROVED DRUG PRODUCTS WITH THERAPEUTIC EQUIVALENCE EVALUATIONS

RxSaurus uses data from the FDA Orange Book (Approved Drug Products with Therapeutic Equivalence Evaluations), published by the U.S. Food and Drug Administration, Center for Drug Evaluation and Research (CDER). The Orange Book is a public domain publication of the U.S. government. The FDA does not endorse or recommend this or any other product or service.

The FDA Orange Book is the authoritative source for therapeutic equivalence evaluations of approved drug products. RxSaurus uses Orange Book data to identify FDA-approved drug products and their application (NDA/ANDA) numbers, determine therapeutic equivalence (TE) codes that indicate whether generic drugs are considered therapeutically equivalent to their reference listed drugs, display patent and exclusivity information associated with approved drug products, and establish AB-rated generic equivalencies.

Therapeutic Equivalence (TE) codes are assigned by the FDA and indicate whether a generic drug product is considered therapeutically equivalent to its reference listed drug. An "AB" rating indicates that the FDA has determined the generic product meets bioequivalence requirements and can be expected to have the same clinical effect and safety profile when administered under the conditions specified in the labeling.

The Orange Book is available at https://www.fda.gov/drugs/drug-approvals-and-databases/approved-drug-products-therapeutic-equivalence-evaluations-orange-book and is updated periodically by the FDA.

4. DAILYMED — DRUG LABELING INFORMATION

RxSaurus uses publicly available drug labeling data from DailyMed, a service provided by the U.S. National Library of Medicine (NLM). DailyMed provides high-quality drug labeling information that has been submitted to the FDA. NLM is not responsible for this product and does not endorse or recommend this or any other product.

DailyMed is the official provider of FDA-approved drug labeling (package inserts) in the United States. RxSaurus uses DailyMed data to access Structured Product Labeling (SPL) documents, obtain detailed drug labeling including indications, dosage and administration, contraindications, warnings and precautions, adverse reactions, and drug interactions, link drug products to their current FDA-approved labeling, and provide users with access to authoritative labeling information.

DailyMed is available at https://dailymed.nlm.nih.gov/dailymed/. DailyMed is updated daily with new and revised drug labeling information.

GENERAL DATA DISCLAIMER

While the data sources listed above are authoritative U.S. government databases, RxSaurus makes no warranties regarding the completeness, accuracy, timeliness, or reliability of the data as displayed on this Site. Data discrepancies may exist between sources, and there may be delays between when official sources are updated and when those changes are reflected on RxSaurus.

Healthcare professionals should always consult primary sources (FDA-approved labeling, current clinical guidelines, and authoritative pharmacy references) for the most current and complete drug information before making clinical decisions.

For questions about our data sources or attribution, please contact: data@rxsaurus.com