Originally posted by jed2023
I wonder why in the world your prof would give you this advice. Is it possible that you misinterpreted him? Because if you didn't, that sounds pretty outlandish.
Every Step I review book I've seen that covers micro (including everyone's best friend, First Aid) discusses the spectrum of action of the various antibiotics. And even if it weren't required, you'd want to know it for 3rd year - and as a future physician.
Imagine that you are starting your medicine rotation during third year. Your attending asks you, "What antibiotic can we give this patient with a Pseudomonas infection?" If you replied, "Penicillin G", he or she might think that you are mentally challenged.
I'm just joking here, but I think all med students are expected to at least know the basics of what drugs cover which bugs.