When should informed consent be obtained?

When should informed consent be obtained?

• A. Before any trial-related procedures; re-consent if new information changes risk/benefit.
• B. After randomization
• C. At trial completion
• D. Only for high-risk procedures

Answer: (A)

Obtaining consent before any trial-related procedures ensures that participation is voluntary and based on a clear understanding of the risks, benefits, and alternatives. This respects the participant’s autonomy from the very start of involvement. Because new information can emerge that changes how a participant should weigh risks and benefits, re-consent is appropriate if such information would alter their willingness to continue. Enrolling after randomization would mean the person agreed to undergo trial procedures without prior informed consent, which violates the fundamental requirement for consent before any trial activities. Waiting until trial completion misses the point of informing participants about risks and plans before they decide to participate. Consent is not limited to high-risk procedures; it is required for all trial-related activities, with the depth of information tailored to the level of risk, not the existence of risk alone.

Obtaining consent before any trial-related procedures ensures that participation is voluntary and based on a clear understanding of the risks, benefits, and alternatives. This respects the participant’s autonomy from the very start of involvement. Because new information can emerge that changes how a participant should weigh risks and benefits, re-consent is appropriate if such information would alter their willingness to continue.

Enrolling after randomization would mean the person agreed to undergo trial procedures without prior informed consent, which violates the fundamental requirement for consent before any trial activities. Waiting until trial completion misses the point of informing participants about risks and plans before they decide to participate. Consent is not limited to high-risk procedures; it is required for all trial-related activities, with the depth of information tailored to the level of risk, not the existence of risk alone.