Topic overview

Start with the big picture

The lesson begins with β-lactams, whose strained ring acylates penicillin-binding proteins and blocks cell-wall synthesis. It compares cephalosporins, carbapenems, and monobactams, then introduces β-lactamase inhibitors and their role in restoring β-lactam activity. Other sections cover glycopeptides and protein-synthesis inhibitors, including aminoglycosides, macrolides, and tetracyclines. The topic also surveys nucleic-acid synthesis inhibitors such as fluoroquinolones, alongside oxazolidinones, lincosamides, streptogramins, nitroimidazoles, and rifamycins. Across these classes, attention is given to how structural features relate to targets, antibacterial spectrum, resistance, and properties such as absorption or adverse-effect risks.