What is the retention requirement for essential trial documents after a study ends in an ICH region?

• A. They can be destroyed immediately after the trial ends.
• B. They should be kept permanently.
• C. They can be returned to the sponsor immediately.
• D. They should be retained for at least 2 years after the last marketing approval, or until there are no pending marketing applications, or at least 2 years after discontinuation, whichever is later.

Answer: (D)

In ICH regions, essential trial documents must be kept for a defined period after the study ends to support regulatory activities and potential investigations. The required retention is at least 2 years after the last marketing approval in an ICH region, or until there are no pending marketing applications, or at least 2 years after discontinuation, whichever is later. This ensures that records remain available if a marketing submission occurs later or if questions arise about the trial. Destroying documents right after the study ends would leave regulators with no records, while permanently keeping everything isn’t mandated. Returning documents to the sponsor immediately also wouldn’t meet the retention obligation. Some local requirements might extend this period, but the standard stated ensures appropriate archival duration.