This is of interest to me, since I developed an allergy to penicillin when I was hospitalized back in 2003. I wonder if it has resolved.
I’m curious too. I was given penicillin about 20 years ago, when I had a very bad flu and complications. After a few days on it, my knee joints started swelling up. I told the doc, and he got me off the penicillin.
I’ve never known if that was an allergy or not, but have assumed on the safe side that it was.
My experience with pharmacists informs me that they are much more knowledgeable than doctors when it come to pharmaceuticals.