Examination of the relationship between oncology drug labeling revision frequency and FDA product categorization.

Objectives: I examined the relationship between the Food and Drug Administration's (FDA's) use of special regulatory designations and the frequency with which labels of oncology drugs are revised to explore how the FDA's designation of products relates to product development and refinement.

Methods: One hundred oncology drugs, designated by the FDA as accelerated approval, priority review, orphan drug, or traditional review, were identified from publicly available information. Drug information for each product was evaluated to assess the rate at which manufacturers revised product labeling.