Nanomedicine first-in-human research: challenges for informed consent.

Risks of harm, translational uncertainty, ambiguities in potential direct benefit, and long-term follow-up merit consideration in first-in-human research. Some nanomedical technologies have additional characteristics that should be addressed, including: defining and describing nanomedical interventions; bystander risks; the therapeutic misconception; and a decision-making context that includes both common use of nanomaterials outside medicine and persistent unknowns about the effects of nanosize. This paper considers how to address these issues in informed consent to first-in-human nanomedicine research.