FDA Draft Guidance for Single-arm Trials in BCG-unresponsive NMIBC

Published

July 22, 2025

Author

Lansbury Sinclair

Lansbury is an intelligence analyst focused on immunology. She tracks clinical and market developments across psoriasis, psoriatic arthritis, and lupus.

In 2024, the FDA issued new draft guidance outlining expanded criteria for utilizing single-arm clinical trials in the approval process for therapies targeting BCG-unresponsive NMIBC. Recognizing the urgent need for effective treatments in this patient population, the guidance aims to expedite drug development by permitting approvals based on single-arm studies, rather than requiring comparative randomized controlled trials (RCTs). This regulatory flexibility significantly reduces the development timeline, enabling faster patient access to innovative therapies. The updated guidance also details specific requirements and expectations for trial designs, outcome measures, and patient populations, ensuring rigorous yet efficient evaluation standards. The draft guidance represents a critical step towards more responsive regulatory practices, promoting rapid innovation and addressing the significant therapeutic gaps in NMIBC management.

Citation: RAPS, 2024. Available at: https://www.raps.org

Implication: Regulatory flexibility could significantly accelerate drug availability and innovation in bladder cancer treatments.