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Glossary · Application Pathways · Orange Book v.04.2026 · refreshed monthly
Application Pathways Orange Book
Application Pathways DefinedTerm · schema.org FDA reference Updated 2026-01-14

What is the Orange Book?

The Orange Book is FDA's official list of approved drug products with therapeutic equivalence evaluations. Essential for generic drug development.

Definition

Orange Book is FDA’s official publication titled “Approved Drug Products with Therapeutic Equivalence Evaluations.” It lists all drugs approved under the FD&C Act, their therapeutic equivalence ratings, patent information, and exclusivity status.

How the Orange Book Works

The Orange Book serves multiple purposes in the pharmaceutical ecosystem, providing transparency on approved products and enabling generic development.

Key Information Included

Therapeutic Equivalence Codes

CodeMeaning
AANo bioequivalence problems
ABBioequivalence demonstrated
ANAerosol products
ATTopical products
BCExtended-release dosage forms
BNNebulizer products
BXInsufficient data

Why BD Teams Track Orange Book

For business development professionals, Orange Book data is essential:

FAQ

Frequently asked

What is the Orange Book?+

The Orange Book is FDA's publication listing all approved drug products with therapeutic equivalence ratings, patent information, and exclusivity data.

Why is it called the Orange Book?+

Named for its original orange cover, the official title is 'Approved Drug Products with Therapeutic Equivalence Evaluations.'

How is the Orange Book used?+

Generic manufacturers use it to identify Reference Listed Drugs and patents to certify against; pharmacists use it for substitution decisions.

What do Orange Book ratings mean?+

Ratings like 'AB' indicate therapeutic equivalence and substitutability; 'BX' indicates insufficient data for equivalence determination.

How often is the Orange Book updated?+

The electronic Orange Book is updated daily with new approvals, patent listings, and exclusivity information.