Alright kiddo, so do you know what a bezoar is? It's a lump of yucky stuff that can form in a person's stomach or intestines if they eat something they're not supposed to, like chewed up hair or plastic.
Now, Bezoardicum is a fancy-sounding name for a medicine that some people used to think could get rid of those yucky bezoars. It was made from a mix of different animal parts and herbs, and people believed that it had special powers to break up those bezoars and help a person feel better.
But here's the thing - modern scientists have found that Bezoardicum doesn't actually do much to help with bezoars. In fact, some of the ingredients in it might even be harmful to people! So while it might have been popular in the olden days, we now know that it's not really a helpful medicine.
Does that help, kiddo?