In a clinical trial, which entity takes responsibility for initiation, management, and financing of the trial?

• A. Sponsor
• B. Sponsor-Investigator
• C. Subinvestigator
• D. Trial Site

Answer: (A)

The main responsibility lies with the sponsor. In clinical trials, the sponsor is the entity that designs the study, finances it, and takes overall charge of initiation and ongoing management. This includes obtaining regulatory approvals, selecting investigators, funding the trial, and overseeing conduct, safety reporting, monitoring, and data integrity. Even when tasks are delegated to contract research organizations or individual investigators, the sponsor remains ultimately accountable for compliance with GCP and for protecting participant rights and welfare.

An investigator who also acts as sponsor (sponsor-investigator) may carry many sponsor duties, but the baseline responsibility for initiation, management, and financing is associated with the sponsor role. Subinvestigators assist in conducting the trial under direction but do not bear the sponsor’s overarching responsibilities. The trial site is simply the location where the trial is conducted, not the entity that initiates or finances the study.