"In the current Wizard World similar to the Medieval era, trying to treat pneumonia with penicillin is very difficult," Richard thought. "Moreover, penicillin can only kill some bacteria and has almost no effect on fungi, so it's best to discard this idea."
So, if not penicillin, what else?
The answer to this question is—sulfonamide.
Penicillin was the first antimicrobial drug discovered in the world and it is the most widely used antimicrobial drug on modern Earth, but it was not the first antimicrobial drug to be used on a large scale.
In the 1930s—Penicillin was discovered, but while its production was still being increased, sulfonamide drugs had already been used clinically to effectively treat infections caused by Hemolytic Streptococcus.
Over the next decade, sulfonamide drugs developed rapidly, and by the 1940s, hundreds of different sulfonamide drugs had been manufactured.
