Which statement describes ensuring information for trial personnel about protocol and investigational products?

• A. Only the principal investigator needs to be informed about the protocol and products.
• B. The sponsor determines who is informed about the protocol and products.
• C. All persons assisting with the trial should be adequately informed about the protocol, the investigational products, and their trial-related duties and functions.
• D. Staff information is optional for those outside the core trial team.

Answer: (C)

In GCP, anyone who helps with a trial must be adequately informed about the study protocol, the investigational product, and their specific duties and responsibilities. This ensures that all individuals involved can conduct procedures correctly, handle the product safely, and report findings and safety concerns consistently. When every person assisting knows the protocol and their role, you reduce the risk of protocol deviations, improper product handling, or missed safety reporting, which protects participant rights and data integrity.

The idea that only the principal investigator needs to be informed or that informing is solely the sponsor’s decision misses this broader training responsibility. Similarly, treating staff outside the core trial team as optional undermines safety and compliance, since anyone who interacts with participants, data, or the investigational product should be properly informed and trained.

So, the best approach is that all persons assisting with the trial are adequately informed about the protocol, the investigational products, and their trial-related duties and functions.