Also known as: learned-intermediary doctrine · learned intermediary rule · learned intermediary defense
Written by attorneys · grounded in primary & secondary sources — see below
A products-liability principle under which a prescription-drug or medical-device manufacturer fulfills its duty to warn of risks by providing adequate information to the prescribing physician rather than directly to the patient. The physician functions as a learned intermediary who applies professional judgment to evaluate risks and benefits for the individual patient and decides what information to convey. Liability for failure to warn does not attach when the manufacturer has adequately warned the physician, absent proof that the warning was inadequate or that a better warning would have changed the prescribing decision.
Lucas Lee was prescribed a new blood-pressure medication by his physician. After suffering a stroke, Lee sued the manufacturer claiming inadequate warnings. The manufacturer had supplied the physician with detailed risk information about stroke potential. The physician's independent judgment in prescribing the drug broke any causal link to the patient.
Lily Lopez received a prescription pain reliever that caused severe side effects. She sued the drug maker for failing to warn her directly. The manufacturer had provided full risk data to her prescribing physician, who weighed the benefits against the dangers for Lopez's specific condition. The duty to warn ran only to the physician.
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Logan Lane underwent knee-implant surgery and later experienced complications. He sued the device manufacturer alleging insufficient warnings. The manufacturer had supplied the surgeon with complete risk information. Lane could not show that a different warning would have altered the surgeon's decision to implant the device.
Yes. Courts applying Florida law have extended the doctrine to prescription medical devices, holding that the manufacturer's duty to warn runs to the prescribing physician rather than the patient.
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A plaintiff must show that an inadequate warning to the physician would have altered the physician's prescribing decision. Generalized evidence that the physician was aware of risks is insufficient.
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Physicians possess the training and judgment to match a drug's risks and benefits to a particular patient's condition and to monitor results. Manufacturers therefore satisfy their duty by warning the medical community rather than each patient.
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…instructions on ways to safely use the product to avoid injury. Carole A. Cheney, Comment: Not Just for Doctors: Applying the Learned Intermediary Doctrine to the Relationship Between Chemical Manufacturers, Industrial Employers, and Employees , 85 Nw. U.L. Rev. 562, 566 (1991). See Hodder v. Goodyear Tire & Rubber Co. , 426 N.W.2d 826, 834…