Science Friday Science Friday

How do clinical trials work, and who can participate?

May 21, 2026 · 21m

Summary

Science Friday explores clinical trial eligibility and FDA drug approval standards with bioethicist Dr. Holly Fernandez-Lynch. The episode addresses why patients who have failed multiple treatments are often excluded from trials to ensure data clarity. It also examines the controversy surrounding accelerated approvals based on surrogate endpoints, such as the Alzheimer’s drug Aduhelm. Finally, the discussion covers the role of Institutional Review Boards and concerns about political interference in FDA decision-making.

Topics discussed

Sponsor messages from Progressive and Alienware Intro: Chris's story of clinical trial rejection Why trials exclude patients who failed other drugs FDA approval standards: Safety and effectiveness Clinical vs. surrogate endpoints in drug trials Controversy over Aduhelm Alzheimer's drug approval Break and transition to oversight discussion Roles of sponsors, FDA, and Institutional Review Boards Differences between academic and commercial IRBs Political interference and changes at the FDA
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