What is the requirement regarding those who assist with the trial?

• A. Only the primary investigator needs to know the protocol.
• B. Assistance staff need not be informed about the protocol.
• C. All personnel involved should be informed about the protocol, products, and duties.
• D. Informing staff is optional if they have prior trial experience.

Answer: (D)

All personnel involved in the trial must be informed about the protocol, the investigational product, and their duties, and they must receive appropriate training before participating. This ensures everyone understands the study procedures, safety considerations, and responsibilities, which protects participant well-being and maintains data integrity. Training should cover the protocol specifics, product handling and administration, adverse event reporting, the informed consent process, documentation, confidentiality, and site SOPs. Training records should be maintained and updated whenever the protocol or procedures change. Even staff with prior trial experience need to be informed and trained on the current study's requirements; prior experience does not substitute for study-specific information.