What Happens if IRB Approval Is Denied?

An IRB disapproval or IRB denial of approval means the Institutional Review Board has determined that a study protocol does not meet the ethical or regulatory standards required for approval including 45 CFR 46, 21 CFR 50, and 21 CFR 56. This outcome can feel like a setback, but it is not necessarily the end of your research. 

Frequently Asked Questions 

What does IRB rejection mean? 

IRB rejection, or IRB disapproval, occurs when a board determines that a submitted protocol fails to adequately protect human subjects. The IRB must provide written documentation outlining the specific concerns that led to the denial as required by 45 CFR § 46.109 (d). 

What are the most common reasons for IRB denial? 

Common reasons for IRB rejection include inadequate informed consent materials, insufficient risk-benefit analysis, unclear participant selection criteria, or missing regulatory documentation. Identifying the specific basis for denial is essential before taking next steps. Learn more about how to submit for IRB review. 

Can I respond to an IRB rejection? 

Yes. In most cases, sponsors and investigators have the opportunity to respond to an IRB disapproval by submitting a revised protocol. An IRB protocol revision allows you to address the board’s concerns directly — whether by modifying the protocol, updating consent language, or providing additional supporting documentation. 

How long does the IRB protocol revision process take? 

Timelines vary depending on the complexity of the required revisions and the review schedule of the IRB. Working with an experienced IRB partner can help accelerate turnaround and reduce the risk of further delays. WCG’s full board review is typically five to eight days, and expedited review is approximately one to three days.   

Can WCG help if my study receives an IRB denial? 

Yes. WCG’s IRB review team works closely with sponsors and investigators to navigate IRB disapproval, supporting protocol revisions and resubmissions with expert guidance. For a free ethical review consultation or for answers to your IRB review questions, get in touch with an expert below.