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Hidden dangers in seeking medical advice from LLMs
Last year, ChatGPT passed the US Medical Licensing Exam and was reported to be “more empathetic” than real doctors. ChatGPT currently has around 180 million users; if a mere 10% of them have asked ChatGPT a medical question, that’s already a population two times larger than New York City using ChatGPT like a doctor. There’s an ongoing explosion of medical chatbot startups building thin wrappers around ChatGPT to dole out medical advice. But ChatGPT is not a doctor, and using ChatGPT for medical advice is not only against OpenAI’s Usage policies, it can be dangerous.
In this article, I identify four key problems with using existing general-purpose chatbots to answer patient-posed medical questions. I provide examples of each problem using real conversations with ChatGPT. I also explain why building a chatbot that can safely answer patient-posed questions is completely different than building a chatbot that can answer USMLE questions. Finally, I describe steps that everyone can take — patients, entrepreneurs, doctors, and companies like OpenAI — to make chatbots medically safer.
Notes
For readability I use the term “ChatGPT,” but the article applies to all publicly available general-purpose large language models (LLMs), including ChatGPT, GPT-4, Llama2, Gemini, and others. A few LLMs specifically designed for medicine do exist, like Med-PaLM; this article is not about those models. I’m focused here on on general-purpose chatbots because (a) they have the most users; (b) they’re easy to access; and (c) many patients are already using them for medical advice.
In the chats with ChatGPT, I provide verbatim quotes of ChatGPT’s response, with ellipses […] to indicate material that was left out for brevity. I never left out anything that would’ve changed my assessment of ChatGPT’s response. For completeness, the full chat transcripts are provided in a Word document attached to the end of this article. The words “Patient:” and “ChatGPT:” are dialogue tags and were added afterwards for clarity. These dialogue tags were not part of the prompts or responses.
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