Hi,

Here are some links that could be of use to you:

https://www.bnf.org/wp-content/uploads/2021/07/summary-antimicrobial-prescribing-guidance_july-21-for-BNF.pdf

https://med.stanford.edu/bugsanddrugs/guidebook.html

Any good pharmacology book

Ask the FDA at CDER

https://www.fda.gov/about-fda/fda-organization/center-drug-evaluation-and-research-cder

This article should be helpful:

Antibiotic Approvals in the Last Decade: Are We Keeping Up With Resistance?

https://pubmed.ncbi.nlm.nih.gov/34259076/