One problem might be that some people use the word "antibiotics" as a synonym for "prescription medication". I found that out when trying to find out what problems my mother was dealing with.

There were quite a few of my relatives and her friends who all said the same thing "she's on 4 antibiotics," but nobody knew any of the drug names. I finally got the drug names and from the names alone (specifically the suffixes) it was clear that there was one antibiotic and one antiviral. I recognized one of the names as a "blood thinner", leaving the last as a glaucoma medication (l looked it up: it's a carbonic anhydrase inhibitor, whatever that is, and diuretic).

They all still refer to all of them as "antibiotics", telling me that I'm overly pedantic.