Are You Really Allergic to Penicillin? (Update)

Jul 17, 2026 · 1h 5m · YouTube

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EP · Freakonomics Radio · Are You Really Allergic to Penicillin? (Update)1:05:15

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0:02Hey there, it's Stephen Dubner.

0:03Until last year, I believed that I was allergic to penicillin.

0:07That belief caused me some unnecessary trouble, and I am not alone.

0:12As I learned, 10% of Americans believe they are allergic to penicillin, but true penicillin allergies are much rarer than that.

0:21So we made an episode about it, which we first published last year.

0:25Since then, we have heard from a ton of listeners who checked out their own alleged penicillin allergies.

0:32And you may have run across this topic on the HBO medical drama, The Pit.

0:36Hanging a grand of Ansef.

0:38Wait, he has a penicillin allergy.

0:39No, PenFest was negative.

0:41We're okay.

0:41I'll say I got a rash with some oxacillin when I was two.

0:44Yeah, probably not a true allergy.

0:46Go ahead and give it a kim.

0:47Most people who think they have a penicillin allergy actually don't.

0:51But many, many people still avoid penicillin based on a faulty diagnosis.

0:56So we decided to replay this episode for you today.

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